diff --git a/backend/src/main/java/core/api/controller/ScheduleController.java b/backend/src/main/java/core/api/controller/ScheduleController.java
index 5242b9d..d07a91c 100644
--- a/backend/src/main/java/core/api/controller/ScheduleController.java
+++ b/backend/src/main/java/core/api/controller/ScheduleController.java
@@ -41,7 +41,7 @@ public class ScheduleController {
     @GetMapping("/schedules/{taskID}")
     public ResponseEntity<?> loadAllSchedulesOfTask(@PathVariable long taskID) {
         PermissionResult<Task> permissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -72,7 +72,7 @@ public class ScheduleController {
 
     private ResponseEntity<?> createAbstractSchedule(long taskID, ScheduleFieldInfo scheduleFieldInfo) {
         PermissionResult<Task> permissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -111,7 +111,7 @@ public class ScheduleController {
 
     private ResponseEntity<?> editAbstractSchedule(long scheduleID, ScheduleFieldInfo scheduleFieldInfo) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -141,7 +141,7 @@ public class ScheduleController {
     @DeleteMapping("/schedules/{scheduleID}")
     public ResponseEntity<?> deleteSchedule(@PathVariable long scheduleID) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -163,7 +163,7 @@ public class ScheduleController {
     @PostMapping("/schedules/{taskID}/now")
     public ResponseEntity<?> scheduleNow(@PathVariable long taskID) {
         PermissionResult<Task> permissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -193,7 +193,7 @@ public class ScheduleController {
     @PostMapping("/schedules/{scheduleID}/activate")
     public ResponseEntity<?> activateSchedule(@PathVariable long scheduleID) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -217,7 +217,7 @@ public class ScheduleController {
     @PostMapping("/schedules/{scheduleID}/stop/{finish}")
     public ResponseEntity<?> stopSchedule(@PathVariable long scheduleID, @PathVariable boolean finish) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -232,7 +232,7 @@ public class ScheduleController {
     @PostMapping("/schedules/{taskID}/forgotten")
     public ResponseEntity<?> registerForgottenSchedule(@PathVariable long taskID, @RequestBody @Valid ForgottenScheduleInfo forgottenScheduleInfo) {
         PermissionResult<Task> permissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -259,7 +259,7 @@ public class ScheduleController {
         List<PermissionResult<AbstractSchedule>> permissionResults = new ArrayList<>();
         for(long scheduleID: scheduleIDs) {
             PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-            if(!permissionResult.isHasPermissions()) {
+            if(permissionResult.isNoPermissions()) {
                 return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
             }
 
@@ -278,7 +278,7 @@ public class ScheduleController {
     @GetMapping("/schedules/{scheduleID}/details")
     public ResponseEntity<?> loadScheduleDetails(@PathVariable long scheduleID) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -292,7 +292,7 @@ public class ScheduleController {
     @PostMapping("/schedules/{scheduleID}/stopManual")
     public ResponseEntity<?> stopManual(@PathVariable long scheduleID, @Valid @RequestBody ManualScheduleStopInfo manualScheduleStopInfo) {
         PermissionResult<AbstractSchedule> permissionResult = taskScheduleService.getSchedulePermissions(scheduleID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!permissionResult.isHasPermissions()) {
+        if(permissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
diff --git a/backend/src/main/java/core/api/controller/StatisticController.java b/backend/src/main/java/core/api/controller/StatisticController.java
index af632be..36e2e0e 100644
--- a/backend/src/main/java/core/api/controller/StatisticController.java
+++ b/backend/src/main/java/core/api/controller/StatisticController.java
@@ -3,9 +3,7 @@ package core.api.controller;
 import core.api.models.auth.SimpleStatusResponse;
 import core.api.models.timemanager.history.TaskgroupActivityInfo;
 import core.api.models.timemanager.history.WorkingStatus;
-import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
 import core.entities.timemanager.AbstractSchedule;
-import core.entities.timemanager.Task;
 import core.entities.timemanager.Taskgroup;
 import core.services.PermissionResult;
 import core.services.ServiceExitCode;
@@ -14,12 +12,10 @@ import core.services.TaskgroupService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.core.parameters.P;
 import org.springframework.web.bind.annotation.*;
 
 import java.time.*;
 import java.time.format.DateTimeFormatter;
-import java.time.temporal.TemporalAdjusters;
 import java.util.*;
 
 @CrossOrigin(origins = "*", maxAge = 3600)
@@ -49,7 +45,7 @@ public class StatisticController {
     @GetMapping("/statistics/taskgroup-activity/{taskgroupID}/{startingDate}/{endingDate}/{includeSubTaskgroups}")
     public ResponseEntity<?> getTaskgroupActivity(@PathVariable long taskgroupID, @PathVariable String startingDate, @PathVariable String endingDate, @PathVariable boolean includeSubTaskgroups){
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!taskgroupPermissionResult.isHasPermissions()) {
+        if(taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         } else if(taskgroupPermissionResult.getExitCode() == ServiceExitCode.MISSING_ENTITY) {
             return ResponseEntity.status(404).body(new SimpleStatusResponse("failed"));
diff --git a/backend/src/main/java/core/api/controller/TaskController.java b/backend/src/main/java/core/api/controller/TaskController.java
index 0d814f0..823e1aa 100644
--- a/backend/src/main/java/core/api/controller/TaskController.java
+++ b/backend/src/main/java/core/api/controller/TaskController.java
@@ -64,7 +64,7 @@ public class TaskController {
     @GetMapping("/tasks/{taskgroupID}/{status}")
     public ResponseEntity<?> listTasksOfTaskgroup(@PathVariable long taskgroupID, @PathVariable String status) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!taskgroupPermissionResult.isHasPermissions()) {
+        if(taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -78,7 +78,7 @@ public class TaskController {
     @PutMapping("/tasks/{taskgroupID}")
     public ResponseEntity<?> createTask(@PathVariable long taskgroupID, @RequestBody @Valid TaskFieldInfo taskFieldInfo) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!taskgroupPermissionResult.isHasPermissions()) {
+        if(taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -101,7 +101,7 @@ public class TaskController {
     @PostMapping("/tasks/{taskID}")
     public ResponseEntity<?> editTask(@PathVariable long taskID, @RequestBody @Valid TaskFieldInfo taskFieldInfo) {
         PermissionResult<Task> taskPermissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskPermissionResult.isHasPermissions()) {
+        if (taskPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -124,7 +124,7 @@ public class TaskController {
     @DeleteMapping("/tasks/{taskID}")
     public ResponseEntity<?> deleteTask(@PathVariable long taskID) {
         PermissionResult<Task> taskPermissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskPermissionResult.isHasPermissions()) {
+        if (taskPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -139,7 +139,7 @@ public class TaskController {
     @GetMapping("/tasks/{taskID}")
     public ResponseEntity<?> loadTaskDetails(@PathVariable long taskID) {
         PermissionResult<Task> taskPermissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskPermissionResult.isHasPermissions()) {
+        if (taskPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -153,7 +153,7 @@ public class TaskController {
     @PostMapping("/tasks/{taskID}/finish")
     public ResponseEntity<?> finishTask(@PathVariable long taskID) {
         PermissionResult<Task> taskPermissionResult = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskPermissionResult.isHasPermissions()) {
+        if (taskPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
diff --git a/backend/src/main/java/core/api/controller/TaskSeriesController.java b/backend/src/main/java/core/api/controller/TaskSeriesController.java
new file mode 100644
index 0000000..bc0238b
--- /dev/null
+++ b/backend/src/main/java/core/api/controller/TaskSeriesController.java
@@ -0,0 +1,40 @@
+package core.api.controller;
+
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatDayInfo;
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatWeekInfo;
+import core.services.ServiceExitCode;
+import core.services.ServiceResult;
+import core.services.TaskSeriesService;
+import core.services.TaskService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+
+@CrossOrigin(origins = "*", maxAge = 3600)
+@RestController
+@RequestMapping("/api")
+public class TaskSeriesController {
+
+    @Autowired private TaskService taskService;
+    @Autowired private TaskSeriesService taskSeriesService;
+
+    @PostMapping("/tasks/taskseries/weekly")
+    public ResponseEntity<?> onCreateTaskSeries(@Valid @RequestBody TaskRepeatWeekInfo taskRepeatWeekInfo) {
+        ServiceExitCode serviceExitCode = taskSeriesService.createTaskSeries(taskRepeatWeekInfo);
+        return serviceExitCode.mapToResponseEntity();
+    }
+
+    @PostMapping("/tasks/{taskID}/taskseries/daily")
+    public ResponseEntity<?> onCreateTaskSeries(@PathVariable long taskID, @Valid @RequestBody TaskRepeatDayInfo taskRepeatDayInfo) {
+        var taskPermission = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
+        if(taskPermission.hasIssue()) {
+            return taskPermission.mapToResponseEntity();
+        } else {
+            ServiceExitCode serviceExitCode = taskSeriesService.createTaskSeries(taskPermission.getResult(), taskRepeatDayInfo);
+            return serviceExitCode.mapToResponseEntity();
+        }
+    }
+}
diff --git a/backend/src/main/java/core/api/controller/TaskgroupController.java b/backend/src/main/java/core/api/controller/TaskgroupController.java
index e9cdea2..7183f13 100644
--- a/backend/src/main/java/core/api/controller/TaskgroupController.java
+++ b/backend/src/main/java/core/api/controller/TaskgroupController.java
@@ -11,7 +11,6 @@ import org.springframework.web.bind.annotation.*;
 
 import javax.validation.Valid;
 import java.util.List;
-import java.util.Set;
 
 @CrossOrigin(origins = "*", maxAge = 3600)
 @RestController
@@ -40,7 +39,7 @@ public class TaskgroupController {
     @PostMapping("/taskgroups/{taskgroupID}")
     public ResponseEntity<?> editTaskgroup(@PathVariable long taskgroupID, @Valid @RequestBody TaskgroupFieldInfo taskgroupFieldInfo) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!taskgroupPermissionResult.isHasPermissions()) {
+        if(taskgroupPermissionResult.isNoPermissions()) {
            return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -59,7 +58,7 @@ public class TaskgroupController {
     @DeleteMapping("/taskgroups/{taskgroupID}")
     public ResponseEntity<?> deleteTaskgroup(@PathVariable long taskgroupID) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskgroupPermissionResult.isHasPermissions()) {
+        if (taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -88,7 +87,7 @@ public class TaskgroupController {
     @GetMapping("/taskgroups/{taskgroupID}")
     public ResponseEntity<?> getDetails(@PathVariable long taskgroupID) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(!taskgroupPermissionResult.isHasPermissions()) {
+        if(taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
@@ -102,7 +101,7 @@ public class TaskgroupController {
     @DeleteMapping("/taskgroups/{taskgroupID}/clear")
     public ResponseEntity<?> clearTasks(@PathVariable long taskgroupID) {
         PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if (!taskgroupPermissionResult.isHasPermissions()) {
+        if (taskgroupPermissionResult.isNoPermissions()) {
             return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
         }
 
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/TaskEntityInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/TaskEntityInfo.java
index 589cc3c..bd5e11e 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/TaskEntityInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/TaskEntityInfo.java
@@ -2,6 +2,7 @@ package core.api.models.timemanager.tasks;
 
 import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
 import core.entities.timemanager.Task;
+import core.services.TaskSeriesService;
 
 import java.time.LocalDate;
 
@@ -27,10 +28,15 @@ public class TaskEntityInfo {
     private boolean hasActiveSchedules;
 
     private boolean hasPlannedSchedules;
+    private boolean hasTaskSerie;
 
     public TaskEntityInfo(Task task) {
         this.taskID = task.getTaskID();
-        this.taskName = task.getTaskName();
+        if(task.getTaskSerieItem() != null) {
+            this.taskName = TaskSeriesService.insertNameIndex(task.getTaskSerieItem().getSeriesIndex(), task.getTaskName());
+        } else {
+            this.taskName = task.getTaskName();
+        }
         this.eta = task.getEta();
         this.startDate = task.getStartDate();
         this.deadline = task.getDeadline();
@@ -42,6 +48,7 @@ public class TaskEntityInfo {
         this.finishable = task.isFinishable();
         this.hasActiveSchedules = task.hasActiveSchedule();
         this.hasPlannedSchedules = task.hasPlannedSchedules();
+        this.hasTaskSerie = task.getTaskSerieItem() != null;
     }
 
     public long getTaskID() {
@@ -131,4 +138,12 @@ public class TaskEntityInfo {
     public void setHasPlannedSchedules(boolean hasPlannedSchedules) {
         this.hasPlannedSchedules = hasPlannedSchedules;
     }
+
+    public boolean isHasTaskSerie() {
+        return hasTaskSerie;
+    }
+
+    public void setHasTaskSerie(boolean hasTaskSerie) {
+        this.hasTaskSerie = hasTaskSerie;
+    }
 }
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/TaskOverviewInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/TaskOverviewInfo.java
index be7df3a..18ec648 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/TaskOverviewInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/TaskOverviewInfo.java
@@ -3,6 +3,7 @@ package core.api.models.timemanager.tasks;
 import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
 import core.entities.timemanager.Task;
 import core.entities.timemanager.Taskgroup;
+import core.services.TaskSeriesService;
 
 import java.time.LocalDate;
 import java.util.List;
@@ -20,7 +21,11 @@ public class TaskOverviewInfo {
 
     public TaskOverviewInfo(Task task) {
         this.taskID = task.getTaskID();
-        this.taskName = task.getTaskName();
+        if(task.getTaskSerieItem() != null) {
+            this.taskName = TaskSeriesService.insertNameIndex(task.getTaskSerieItem().getSeriesIndex(), task.getTaskName());
+        } else {
+            this.taskName = task.getTaskName();
+        }
         this.activeMinutes = task.getWorkTime();
         this.eta = task.getEta();
         this.limit = task.getDeadline();
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/TaskShortInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/TaskShortInfo.java
index e422128..140ad71 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/TaskShortInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/TaskShortInfo.java
@@ -1,6 +1,7 @@
 package core.api.models.timemanager.tasks;
 
 import core.entities.timemanager.Task;
+import core.services.TaskSeriesService;
 
 public class TaskShortInfo {
 
@@ -11,7 +12,12 @@ public class TaskShortInfo {
 
     public TaskShortInfo(Task task) {
         this.taskID = task.getTaskID();
-        this.taskName = task.getTaskName();
+        if(task.getTaskSerieItem() != null) {
+            this.taskName = TaskSeriesService.insertNameIndex(task.getTaskSerieItem().getSeriesIndex(), task.getTaskName());
+        } else {
+            this.taskName = task.getTaskName();
+        }
+
         this.finishable = task.isFinishable();
     }
 
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/TaskTaskgroupInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/TaskTaskgroupInfo.java
index e82bba7..e8b7e00 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/TaskTaskgroupInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/TaskTaskgroupInfo.java
@@ -3,6 +3,7 @@ package core.api.models.timemanager.tasks;
 import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
 import core.entities.timemanager.Task;
 import core.entities.timemanager.Taskgroup;
+import core.services.TaskSeriesService;
 
 import java.time.LocalDate;
 import java.util.ArrayList;
@@ -31,7 +32,11 @@ public class TaskTaskgroupInfo {
 
     public TaskTaskgroupInfo(Task task) {
         this.taskID = task.getTaskID();
-        this.taskName = task.getTaskName();
+        if(task.getTaskSerieItem() != null) {
+            this.taskName = TaskSeriesService.insertNameIndex(task.getTaskSerieItem().getSeriesIndex(), task.getTaskName());
+        } else {
+            this.taskName = task.getTaskName();
+        }
         this.eta = task.getEta();
         this.startDate = task.getStartDate();
         this.deadline = task.getDeadline();
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/DeadlineStrategy.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/DeadlineStrategy.java
new file mode 100644
index 0000000..13d93c0
--- /dev/null
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/DeadlineStrategy.java
@@ -0,0 +1,8 @@
+package core.api.models.timemanager.tasks.repeatinginfo;
+
+public enum DeadlineStrategy {
+
+    FIX_DEADLINE,
+    DEADLINE_EQUAL_START,
+    DEADLINE_FIT_START
+}
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatDayInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatDayInfo.java
new file mode 100644
index 0000000..a188057
--- /dev/null
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatDayInfo.java
@@ -0,0 +1,38 @@
+package core.api.models.timemanager.tasks.repeatinginfo;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import java.time.LocalDate;
+
+public class TaskRepeatDayInfo {
+
+    private int offset;
+    private DeadlineStrategy deadlineStrategy;
+
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
+    private LocalDate endingDate;
+
+    public int getOffset() {
+        return offset;
+    }
+
+    public void setOffset(int offset) {
+        this.offset = offset;
+    }
+
+    public DeadlineStrategy getDeadlineStrategy() {
+        return deadlineStrategy;
+    }
+
+    public void setDeadlineStrategy(DeadlineStrategy deadlineStrategy) {
+        this.deadlineStrategy = deadlineStrategy;
+    }
+
+    public LocalDate getEndingDate() {
+        return endingDate;
+    }
+
+    public void setEndingDate(LocalDate endingDate) {
+        this.endingDate = endingDate;
+    }
+}
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java
new file mode 100644
index 0000000..4330b2b
--- /dev/null
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java
@@ -0,0 +1,27 @@
+package core.api.models.timemanager.tasks.repeatinginfo;
+
+import core.api.models.timemanager.tasks.TaskEntityInfo;
+import core.entities.timemanager.Task;
+
+import java.time.DayOfWeek;
+
+public class TaskRepeatWeekDayInfo {
+    private int offset;
+    private long taskID;
+
+    public int getOffset() {
+        return offset;
+    }
+
+    public void setOffset(int offset) {
+        this.offset = offset;
+    }
+
+    public long getTaskID() {
+        return taskID;
+    }
+
+    public void setTaskID(long taskID) {
+        this.taskID = taskID;
+    }
+}
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java
new file mode 100644
index 0000000..39b4b22
--- /dev/null
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java
@@ -0,0 +1,41 @@
+package core.api.models.timemanager.tasks.repeatinginfo;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import org.hibernate.validator.constraints.Length;
+
+import javax.validation.constraints.Size;
+import java.time.LocalDate;
+import java.util.List;
+
+public class TaskRepeatWeekInfo {
+
+    @Size(min = 1, max = 7)
+    private List<TaskRepeatWeekDayInfo> weekDayInfos;
+    private DeadlineStrategy deadlineStrategy;
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
+    private LocalDate endDate;
+
+    public List<TaskRepeatWeekDayInfo> getWeekDayInfos() {
+        return weekDayInfos;
+    }
+
+    public void setWeekDayInfos(List<TaskRepeatWeekDayInfo> weekDayInfos) {
+        this.weekDayInfos = weekDayInfos;
+    }
+
+    public DeadlineStrategy getDeadlineStrategy() {
+        return deadlineStrategy;
+    }
+
+    public void setDeadlineStrategy(DeadlineStrategy deadlineStrategy) {
+        this.deadlineStrategy = deadlineStrategy;
+    }
+
+    public LocalDate getEndDate() {
+        return endDate;
+    }
+
+    public void setEndDate(LocalDate endDate) {
+        this.endDate = endDate;
+    }
+}
diff --git a/backend/src/main/java/core/entities/timemanager/AbstractSchedule.java b/backend/src/main/java/core/entities/timemanager/AbstractSchedule.java
index f7f4de1..a903c23 100644
--- a/backend/src/main/java/core/entities/timemanager/AbstractSchedule.java
+++ b/backend/src/main/java/core/entities/timemanager/AbstractSchedule.java
@@ -124,4 +124,8 @@ public abstract class AbstractSchedule {
             return (int) duration.toMinutes();
         }
     }
+
+    public abstract AbstractSchedule cloneSchedule();
+
+    public abstract void shiftSchedule(long numberDays);
 }
diff --git a/backend/src/main/java/core/entities/timemanager/AdvancedTaskSchedule.java b/backend/src/main/java/core/entities/timemanager/AdvancedTaskSchedule.java
index 2289c09..91f1d7c 100644
--- a/backend/src/main/java/core/entities/timemanager/AdvancedTaskSchedule.java
+++ b/backend/src/main/java/core/entities/timemanager/AdvancedTaskSchedule.java
@@ -71,4 +71,15 @@ public class AdvancedTaskSchedule extends AbstractSchedule {
     public boolean isMissed(LocalDateTime timeReference) {
         return startTime == null && scheduleEnd.toLocalDate().isBefore(timeReference.toLocalDate());
     }
+
+    @Override
+    public AbstractSchedule cloneSchedule() {
+        return new AdvancedTaskSchedule(this.task, this.scheduleStart, this.scheduleEnd);
+    }
+
+    @Override
+    public void shiftSchedule(long numberDays) {
+        this.scheduleStart = this.scheduleStart.plusDays(numberDays);
+        this.scheduleEnd = this.scheduleEnd.plusDays(numberDays);
+    }
 }
diff --git a/backend/src/main/java/core/entities/timemanager/BasicTaskSchedule.java b/backend/src/main/java/core/entities/timemanager/BasicTaskSchedule.java
index fe6a393..07e13d5 100644
--- a/backend/src/main/java/core/entities/timemanager/BasicTaskSchedule.java
+++ b/backend/src/main/java/core/entities/timemanager/BasicTaskSchedule.java
@@ -52,4 +52,14 @@ public class BasicTaskSchedule extends AbstractSchedule{
     public boolean isMissed(LocalDateTime timeReference) {
         return startTime == null && scheduleDate.isBefore(timeReference.toLocalDate());
     }
+
+    @Override
+    public AbstractSchedule cloneSchedule() {
+        return new BasicTaskSchedule(this.task,  this.scheduleDate);
+    }
+
+    @Override
+    public void shiftSchedule(long numberDays) {
+        this.scheduleDate = this.scheduleDate.plusDays(numberDays);
+    }
 }
diff --git a/backend/src/main/java/core/entities/timemanager/Task.java b/backend/src/main/java/core/entities/timemanager/Task.java
index b6bf550..dbb92c5 100644
--- a/backend/src/main/java/core/entities/timemanager/Task.java
+++ b/backend/src/main/java/core/entities/timemanager/Task.java
@@ -22,21 +22,16 @@ public class Task {
     @JoinColumn(name = "taskgroup_id")
     private Taskgroup taskgroup;
     private String taskName;
-
     private LocalDate startDate;
-
     private LocalDate deadline;
-
     private int eta;
-
     private boolean finished;
-
     private boolean finishable;
-
     @OneToMany(mappedBy = "task", cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
     private List<AbstractSchedule> basicTaskSchedules;
-
     private int workTime;
+    @OneToOne(mappedBy = "task", cascade = CascadeType.ALL, orphanRemoval = true)
+    private TaskSerieItem taskSerieItem;
 
     public Task() {
         this.basicTaskSchedules = new ArrayList<>();
@@ -52,6 +47,17 @@ public class Task {
         this.finishable = taskFieldInfo.isFinishable();
     }
 
+    public static Task cloneTask(Task task) {
+       Task clonedTask = new Task();
+       clonedTask.setTaskgroup(task.getTaskgroup());
+       clonedTask.setTaskName(task.taskName);
+       clonedTask.setEta(task.eta);
+       clonedTask.setFinished(false);
+       clonedTask.setFinishable(task.finishable);
+       return clonedTask;
+    }
+
+
     public long getTaskID() {
         return taskID;
     }
@@ -124,6 +130,14 @@ public class Task {
         this.taskID = taskID;
     }
 
+    public TaskSerieItem getTaskSerieItem() {
+        return taskSerieItem;
+    }
+
+    public void setTaskSerieItem(TaskSerieItem taskSerieItem) {
+        this.taskSerieItem = taskSerieItem;
+    }
+
     public List<AbstractSchedule> getBasicTaskSchedules() {
         if(basicTaskSchedules == null) {
             return new ArrayList<>();
@@ -140,7 +154,7 @@ public class Task {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
         Task task = (Task) o;
-        return taskID == task.taskID && eta == task.eta && finished == task.finished && workTime == task.workTime && Objects.equals(taskgroup, task.taskgroup) && Objects.equals(taskName, task.taskName) && Objects.equals(startDate, task.startDate) && Objects.equals(deadline, task.deadline);
+        return taskID == task.taskID;
     }
 
     @Override
diff --git a/backend/src/main/java/core/entities/timemanager/TaskSerie.java b/backend/src/main/java/core/entities/timemanager/TaskSerie.java
new file mode 100644
index 0000000..50be1c7
--- /dev/null
+++ b/backend/src/main/java/core/entities/timemanager/TaskSerie.java
@@ -0,0 +1,42 @@
+package core.entities.timemanager;
+
+import javax.persistence.*;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Table(name = "task_series")
+public class TaskSerie {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long taskSerieID;
+
+    @OneToMany(fetch = FetchType.EAGER, mappedBy = "taskSerie", orphanRemoval = true)
+    List<TaskSerieItem> tasks = new ArrayList<>();
+
+
+
+
+    public long getTaskSerieID() {
+        return taskSerieID;
+    }
+
+    public void setTaskSerieID(long taskSerieID) {
+        this.taskSerieID = taskSerieID;
+    }
+
+    public List<TaskSerieItem> getTasks() {
+        return tasks;
+    }
+
+    public void setTasks(List<TaskSerieItem> tasks) {
+        this.tasks = tasks;
+    }
+
+    public TaskSerieItem addTask(Task task) {
+        TaskSerieItem taskSerieItem = new TaskSerieItem(this, task, this.tasks.size()+1);
+        this.tasks.add(taskSerieItem);
+        return taskSerieItem;
+    }
+}
diff --git a/backend/src/main/java/core/entities/timemanager/TaskSerieItem.java b/backend/src/main/java/core/entities/timemanager/TaskSerieItem.java
new file mode 100644
index 0000000..533a931
--- /dev/null
+++ b/backend/src/main/java/core/entities/timemanager/TaskSerieItem.java
@@ -0,0 +1,78 @@
+package core.entities.timemanager;
+
+import javax.persistence.*;
+import java.util.Objects;
+
+@Entity
+@Table(name = "task_series_items")
+public class TaskSerieItem {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long itemID;
+
+    @ManyToOne
+    @JoinColumn(referencedColumnName = "taskSerieID")
+    private TaskSerie taskSerie;
+
+    @OneToOne
+    @JoinColumn(name = "task_id")
+    private Task task;
+
+
+    private int seriesIndex;
+
+    public TaskSerieItem(TaskSerie taskSerie, Task task, int index) {
+        this.taskSerie = taskSerie;
+        this.seriesIndex = index;
+        this.task = task;
+    }
+
+    public TaskSerieItem() {
+    }
+
+    public long getItemID() {
+        return itemID;
+    }
+
+    public void setItemID(long itemID) {
+        this.itemID = itemID;
+    }
+
+    public TaskSerie getTaskSerie() {
+        return taskSerie;
+    }
+
+    public void setTaskSerie(TaskSerie taskSerie) {
+        this.taskSerie = taskSerie;
+    }
+
+    public int getSeriesIndex() {
+        return seriesIndex;
+    }
+
+    public void setSeriesIndex(int seriesIndex) {
+        this.seriesIndex = seriesIndex;
+    }
+
+    public Task getTask() {
+        return task;
+    }
+
+    public void setTask(Task task) {
+        this.task = task;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        TaskSerieItem that = (TaskSerieItem) o;
+        return itemID == that.itemID;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(itemID);
+    }
+}
diff --git a/backend/src/main/java/core/repositories/timemanager/TaskRepository.java b/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
index d4f7268..208dbe6 100644
--- a/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
+++ b/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
@@ -20,6 +20,7 @@ public interface TaskRepository extends CrudRepository<Task, Long> {
 
     @Modifying
     @Transactional
+    @Query(value = "DELETE FROM Task t WHERE t.taskgroup = ?1")
     void deleteAllByTaskgroup(Taskgroup taskgroup);
 
     @Transactional
diff --git a/backend/src/main/java/core/repositories/timemanager/TaskSerieItemRepository.java b/backend/src/main/java/core/repositories/timemanager/TaskSerieItemRepository.java
new file mode 100644
index 0000000..73e9008
--- /dev/null
+++ b/backend/src/main/java/core/repositories/timemanager/TaskSerieItemRepository.java
@@ -0,0 +1,19 @@
+package core.repositories.timemanager;
+
+import core.entities.timemanager.TaskSerieItem;
+import core.entities.timemanager.Taskgroup;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+import javax.transaction.Transactional;
+
+@Repository
+public interface TaskSerieItemRepository extends CrudRepository<TaskSerieItem, Long> {
+
+    @Query(value = "DELETE FROM TaskSerieItem tsi WHERE tsi.task IN (SELECT t FROM Task t WHERE t.taskgroup = ?1)")
+    @Modifying
+    @Transactional
+    void deleteByTaskgroup(Taskgroup taskgroup);
+}
diff --git a/backend/src/main/java/core/repositories/timemanager/TaskSeriesRepository.java b/backend/src/main/java/core/repositories/timemanager/TaskSeriesRepository.java
new file mode 100644
index 0000000..c0b7301
--- /dev/null
+++ b/backend/src/main/java/core/repositories/timemanager/TaskSeriesRepository.java
@@ -0,0 +1,23 @@
+package core.repositories.timemanager;
+
+import core.entities.timemanager.TaskSerie;
+import core.entities.timemanager.Taskgroup;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import javax.transaction.Transactional;
+import java.util.List;
+
+@Repository
+public interface TaskSeriesRepository extends CrudRepository<TaskSerie, Long> {
+    @Query("SELECT DISTINCT ts FROM TaskSerie ts JOIN ts.tasks tsi JOIN tsi.task t WHERE t.taskgroup = :taskgroup")
+    List<TaskSerie> findByTaskgroup(@Param("taskgroup")Taskgroup taskgroup);
+
+    @Modifying
+    @Transactional
+    @Query(value = "DELETE FROM TaskSerie ts WHERE ts.tasks.size = 0")
+    void deleteUnreferenced();
+}
diff --git a/backend/src/main/java/core/services/PermissionResult.java b/backend/src/main/java/core/services/PermissionResult.java
index aafe4ef..c7b9a76 100644
--- a/backend/src/main/java/core/services/PermissionResult.java
+++ b/backend/src/main/java/core/services/PermissionResult.java
@@ -1,5 +1,8 @@
 package core.services;
 
+import core.api.models.auth.SimpleStatusResponse;
+import org.springframework.http.ResponseEntity;
+
 public class PermissionResult <T> extends ServiceResult<T> {
 
     private boolean hasPermissions;
@@ -30,11 +33,25 @@ public class PermissionResult <T> extends ServiceResult<T> {
         this.hasPermissions = hasPermissions;
     }
 
-    public boolean isHasPermissions() {
-        return hasPermissions;
+    public boolean isNoPermissions() {
+        return !hasPermissions;
     }
 
     public void setHasPermissions(boolean hasPermissions) {
         this.hasPermissions = hasPermissions;
     }
+
+    @Override
+    public ResponseEntity<?> mapToResponseEntity() {
+        if(isNoPermissions()) {
+            return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
+        } else {
+            return super.mapToResponseEntity();
+        }
+    }
+
+    @Override
+    public boolean hasIssue() {
+        return super.hasIssue() || isNoPermissions();
+    }
 }
diff --git a/backend/src/main/java/core/services/ServiceExitCode.java b/backend/src/main/java/core/services/ServiceExitCode.java
index 93cbddd..452f52c 100644
--- a/backend/src/main/java/core/services/ServiceExitCode.java
+++ b/backend/src/main/java/core/services/ServiceExitCode.java
@@ -1,5 +1,8 @@
 package core.services;
 
+import core.api.models.auth.SimpleStatusResponse;
+import org.springframework.http.ResponseEntity;
+
 public enum ServiceExitCode {
 
     OK,
@@ -7,4 +10,13 @@ public enum ServiceExitCode {
     MISSING_ENTITY,
     INVALID_OPERATION,
     INVALID_PARAMETER;
+
+    public ResponseEntity<SimpleStatusResponse> mapToResponseEntity() {
+        return switch (this) {
+            case OK -> ResponseEntity.ok(new SimpleStatusResponse("success"));
+            case MISSING_ENTITY -> ResponseEntity.status(404).body(new SimpleStatusResponse("failed"));
+            case ENTITY_ALREADY_EXIST -> ResponseEntity.status(409).body(new SimpleStatusResponse("failed"));
+            case INVALID_OPERATION, INVALID_PARAMETER -> ResponseEntity.status(400).body(new SimpleStatusResponse("failed"));
+        };
+    }
 }
diff --git a/backend/src/main/java/core/services/ServiceResult.java b/backend/src/main/java/core/services/ServiceResult.java
index da9e03d..179b514 100644
--- a/backend/src/main/java/core/services/ServiceResult.java
+++ b/backend/src/main/java/core/services/ServiceResult.java
@@ -1,5 +1,8 @@
 package core.services;
 
+import core.api.models.auth.SimpleStatusResponse;
+import org.springframework.http.ResponseEntity;
+
 public class ServiceResult <T> {
 
     private ServiceExitCode exitCode;
@@ -34,4 +37,12 @@ public class ServiceResult <T> {
     public void setResult(T result) {
         this.result = result;
     }
+
+    public boolean hasIssue() {
+        return exitCode != ServiceExitCode.OK;
+    }
+
+    public ResponseEntity<?> mapToResponseEntity() {
+        return exitCode.mapToResponseEntity();
+    }
 }
diff --git a/backend/src/main/java/core/services/TaskSeriesService.java b/backend/src/main/java/core/services/TaskSeriesService.java
new file mode 100644
index 0000000..7f1eb85
--- /dev/null
+++ b/backend/src/main/java/core/services/TaskSeriesService.java
@@ -0,0 +1,184 @@
+package core.services;
+
+import core.api.models.timemanager.tasks.repeatinginfo.DeadlineStrategy;
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatDayInfo;
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatWeekDayInfo;
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatWeekInfo;
+import core.entities.timemanager.*;
+import core.repositories.timemanager.ScheduleRepository;
+import core.repositories.timemanager.TaskRepository;
+import core.repositories.timemanager.TaskSerieItemRepository;
+import core.repositories.timemanager.TaskSeriesRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.time.Duration;
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class TaskSeriesService {
+
+    @Autowired private TaskRepository taskRepository;
+    @Autowired private TaskSeriesRepository taskSeriesRepository;
+    @Autowired private TaskSerieItemRepository taskSerieItemRepository;
+    @Autowired private ScheduleRepository scheduleRepository;
+
+
+    public ServiceExitCode createTaskSeries(TaskRepeatWeekInfo taskRepeatInfo) {
+        List<Task> createdTasks = new ArrayList<>();
+        TaskSerie taskSerie = new TaskSerie();
+        List<AbstractSchedule> abstractSchedules = new ArrayList<>();
+
+        for(TaskRepeatWeekDayInfo taskRepeatDayInfo : taskRepeatInfo.getWeekDayInfos()) {
+            Optional<Task> task = taskRepository.findById(taskRepeatDayInfo.getTaskID());
+            if(task.isEmpty()) return ServiceExitCode.MISSING_ENTITY;
+
+            TaskSerieItem rootItem = taskSerie.addTask(task.get());
+            task.get().setTaskSerieItem(rootItem);
+
+            LocalDate currentTaskDate = task.get().getStartDate().plusDays(taskRepeatDayInfo.getOffset());
+            while(currentTaskDate.isBefore(taskRepeatInfo.getEndDate())) {
+                Task clonedTask = Task.cloneTask(task.get());
+                clonedTask.setStartDate(currentTaskDate);
+
+                TaskSerieItem taskSerieItem = taskSerie.addTask(clonedTask);
+                clonedTask.setTaskSerieItem(taskSerieItem);
+                createdTasks.add(clonedTask);
+
+                abstractSchedules.addAll(cloneSchedules(task.get(), clonedTask));
+                currentTaskDate = currentTaskDate.plusDays(taskRepeatDayInfo.getOffset());
+            }
+        }
+
+        taskSerie.getTasks().sort(Comparator.comparing(o -> o.getTask().getStartDate()));
+        for(int i=0; i<taskSerie.getTasks().size(); i++) {
+            taskSerie.getTasks().get(i).setSeriesIndex(i+1);
+            if(taskRepeatInfo.getDeadlineStrategy() == DeadlineStrategy.DEADLINE_EQUAL_START) {
+                taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i).getTask().getStartDate());
+            } else {
+                if(i + 1 == taskSerie.getTasks().size()) {
+                    int firstWeekDayIndex = i % taskRepeatInfo.getWeekDayInfos().size();
+                    LocalDate reference_start = taskSerie.getTasks().get(firstWeekDayIndex).getTask().getStartDate();
+                    LocalDate reference_deadline = taskSerie.getTasks().get(firstWeekDayIndex).getTask().getDeadline();
+
+                    Duration duration = Duration.between(reference_start, reference_deadline);
+                    long days = duration.toDays();
+                    taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i).getTask().getStartDate().plusDays(days));
+                } else {
+                    taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i+1).getTask().getStartDate().minusDays(1));
+                }
+            }
+        }
+
+        taskSeriesRepository.save(taskSerie);
+        taskRepository.saveAll(createdTasks);
+        taskSerieItemRepository.saveAll(taskSerie.getTasks());
+        scheduleRepository.saveAll(abstractSchedules);
+
+        return ServiceExitCode.OK;
+    }
+
+    public ServiceExitCode createTaskSeries(Task rootTask, TaskRepeatDayInfo taskRepeatInfo) {
+        if(taskRepeatInfo.getDeadlineStrategy() == DeadlineStrategy.FIX_DEADLINE) {
+            return ServiceExitCode.INVALID_PARAMETER;
+        }
+
+        List<Task> taskList = new ArrayList<>();
+        List<AbstractSchedule> abstractSchedules = new ArrayList<>();
+        TaskSerie taskSerie = new TaskSerie();
+        TaskSerieItem rootItem = taskSerie.addTask(rootTask);
+        rootTask.setTaskSerieItem(rootItem);
+
+        LocalDate currentTaskDate = rootTask.getStartDate().plusDays(taskRepeatInfo.getOffset());
+        while(currentTaskDate.isBefore(taskRepeatInfo.getEndingDate())) {
+            Task task = Task.cloneTask(rootTask);
+            task.setStartDate(currentTaskDate);
+            if(taskRepeatInfo.getDeadlineStrategy() == DeadlineStrategy.DEADLINE_EQUAL_START) {
+                task.setDeadline(currentTaskDate);
+            } else if(taskRepeatInfo.getDeadlineStrategy() == DeadlineStrategy.DEADLINE_FIT_START) {
+                task.setDeadline(currentTaskDate.plusDays(taskRepeatInfo.getOffset()-1));
+            }
+            TaskSerieItem taskSerieItem = taskSerie.addTask(task);
+            taskList.add(task);
+            task.setTaskSerieItem(taskSerieItem);
+
+            abstractSchedules.addAll(cloneSchedules(rootTask, task));
+            currentTaskDate = currentTaskDate.plusDays(taskRepeatInfo.getOffset());
+        }
+
+        taskSeriesRepository.save(taskSerie);
+        taskRepository.saveAll(taskList);
+        taskSerieItemRepository.saveAll(taskSerie.getTasks());
+        scheduleRepository.saveAll(abstractSchedules);
+
+        return ServiceExitCode.OK;
+    }
+
+    public List<AbstractSchedule> cloneSchedules(Task previousTask, Task nextTask) {
+        long numberDays = ChronoUnit.DAYS.between(previousTask.getStartDate(), nextTask.getStartDate());
+
+        List<AbstractSchedule> clonedSchedules = new ArrayList<>();
+        for(AbstractSchedule abstractSchedule : previousTask.getBasicTaskSchedules()) {
+            AbstractSchedule clonedSchedule = abstractSchedule.cloneSchedule();
+            clonedSchedule.shiftSchedule(numberDays);
+
+            clonedSchedules.add(clonedSchedule);
+        }
+        return clonedSchedules;
+    }
+
+    public void deleteTaskSeriesItem(Task task) {
+        TaskSerieItem item = task.getTaskSerieItem();
+        TaskSerie taskSerie = task.getTaskSerieItem().getTaskSerie();
+        taskSerie.getTasks().remove(item);
+        task.setTaskSerieItem(null);
+        taskSerieItemRepository.delete(item);
+        if(taskSerie.getTasks().isEmpty()) {
+            for(TaskSerieItem taskSerieItem : taskSerie.getTasks()) {
+                taskSerieItem.setTaskSerie(null);
+            }
+            taskSerie.getTasks().clear();
+            taskSeriesRepository.delete(taskSerie);
+        } else {
+            repearIndexing(taskSerie);
+        }
+    }
+
+    private void repearIndexing(TaskSerie taskSerie) {
+        taskSerie.getTasks().sort(Comparator.comparingInt(TaskSerieItem::getSeriesIndex));
+        List<TaskSerieItem> updatedItems = new ArrayList<>();
+        int currentIndex = 1;
+        for(TaskSerieItem taskSerieItem : taskSerie.getTasks()) {
+            if(taskSerieItem.getSeriesIndex() != currentIndex) {
+                taskSerieItem.setSeriesIndex(currentIndex);
+                updatedItems.add(taskSerieItem);
+            }
+
+            currentIndex++;
+        }
+
+        taskSerieItemRepository.saveAll(updatedItems);
+    }
+
+    public void deleteTaskSerieByTaskgroup(Taskgroup taskgroup) {
+        taskSerieItemRepository.deleteByTaskgroup(taskgroup);
+        taskSeriesRepository.deleteUnreferenced();
+    }
+
+    public static String convertIndexToString(int index) {
+        if(index < 10) {
+            return "0" + index;
+        } else {
+            return String.valueOf(index);
+        }
+    }
+
+    public static String insertNameIndex(int seriesIndex, String taskName) {
+        return taskName.replaceAll("\\$\\{i}", convertIndexToString(seriesIndex));
+    }
+}
diff --git a/backend/src/main/java/core/services/TaskService.java b/backend/src/main/java/core/services/TaskService.java
index 73f9336..292b442 100644
--- a/backend/src/main/java/core/services/TaskService.java
+++ b/backend/src/main/java/core/services/TaskService.java
@@ -6,6 +6,8 @@ import core.entities.timemanager.AbstractSchedule;
 import core.entities.timemanager.Task;
 import core.entities.timemanager.Taskgroup;
 import core.repositories.timemanager.TaskRepository;
+import core.repositories.timemanager.TaskSerieItemRepository;
+import core.repositories.timemanager.TaskSeriesRepository;
 import core.repositories.timemanager.TaskgroupRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -20,20 +22,20 @@ public class TaskService {
     private final TaskScheduleService taskScheduleService;
     private final TaskgroupRepository taskgroupRepository;
 
+    private final TaskSeriesService taskSeriesService;
+
 
     public TaskService(@Autowired TaskRepository taskRepository,
                        @Autowired TaskScheduleService taskScheduleService,
-                       TaskgroupRepository taskgroupRepository) {
+                       @Autowired TaskgroupRepository taskgroupRepository,
+                       @Autowired TaskSeriesService taskSeriesService) {
         this.taskRepository = taskRepository;
         this.taskScheduleService = taskScheduleService;
         this.taskgroupRepository = taskgroupRepository;
+        this.taskSeriesService = taskSeriesService;
     }
 
     public ServiceResult<Task> createTask(Taskgroup taskgroup, TaskFieldInfo taskFieldInfo) {
-        if(existTaskByName(taskgroup.getTasks(), taskFieldInfo.getTaskName())) {
-            return new ServiceResult<>(ServiceExitCode.ENTITY_ALREADY_EXIST);
-        }
-
         //Check for invalid date (deadline before start
         if(taskFieldInfo.getStartDate() != null && taskFieldInfo.getDeadline() != null &&
                 taskFieldInfo.getDeadline().isBefore(taskFieldInfo.getStartDate())) {
@@ -86,16 +88,17 @@ public class TaskService {
     }
 
     public void deleteTask(Task task) {
-        //taskScheduleService.deleteScheduleByTask(task);
-        System.err.println(task.getTaskID());
         task.getTaskgroup().getTasks().remove(task);
         taskgroupRepository.save(task.getTaskgroup());
-        task.setTaskgroup(null);
-        taskRepository.save(task);
+        if(task.getTaskSerieItem() != null) {
+            taskSeriesService.deleteTaskSeriesItem(task);
+        }
         taskRepository.delete(task);
+
     }
 
     public void clearTasks(Taskgroup taskgroup) {
+        taskSeriesService.deleteTaskSerieByTaskgroup(taskgroup);
         taskRepository.deleteAllByTaskgroup(taskgroup);
     }
 
diff --git a/frontend/src/api/.openapi-generator/FILES b/frontend/src/api/.openapi-generator/FILES
index 3595c4b..8171b54 100644
--- a/frontend/src/api/.openapi-generator/FILES
+++ b/frontend/src/api/.openapi-generator/FILES
@@ -10,6 +10,7 @@ api/properties.service.ts
 api/schedule.service.ts
 api/task.service.ts
 api/taskgroup.service.ts
+api/taskseries.service.ts
 api/users.service.ts
 configuration.ts
 encoder.ts
@@ -47,6 +48,9 @@ model/simpleStatusResponse.ts
 model/taskEntityInfo.ts
 model/taskFieldInfo.ts
 model/taskOverviewInfo.ts
+model/taskRepeatDayInfo.ts
+model/taskRepeatWeekDayInfo.ts
+model/taskRepeatWeekInfo.ts
 model/taskScheduleStopResponse.ts
 model/taskShortInfo.ts
 model/taskTaskgroupInfo.ts
diff --git a/frontend/src/api/api.module.ts b/frontend/src/api/api.module.ts
index 63562e7..f2f84b6 100644
--- a/frontend/src/api/api.module.ts
+++ b/frontend/src/api/api.module.ts
@@ -10,6 +10,7 @@ import { PropertiesService } from './api/properties.service';
 import { ScheduleService } from './api/schedule.service';
 import { TaskService } from './api/task.service';
 import { TaskgroupService } from './api/taskgroup.service';
+import { TaskseriesService } from './api/taskseries.service';
 import { UsersService } from './api/users.service';
 
 @NgModule({
diff --git a/frontend/src/api/api/api.ts b/frontend/src/api/api/api.ts
index 75dbaae..37fe840 100644
--- a/frontend/src/api/api/api.ts
+++ b/frontend/src/api/api/api.ts
@@ -14,6 +14,8 @@ export * from './task.service';
 import { TaskService } from './task.service';
 export * from './taskgroup.service';
 import { TaskgroupService } from './taskgroup.service';
+export * from './taskseries.service';
+import { TaskseriesService } from './taskseries.service';
 export * from './users.service';
 import { UsersService } from './users.service';
-export const APIS = [AccountService, HistoryService, LoginService, NtfyService, PropertiesService, ScheduleService, TaskService, TaskgroupService, UsersService];
+export const APIS = [AccountService, HistoryService, LoginService, NtfyService, PropertiesService, ScheduleService, TaskService, TaskgroupService, TaskseriesService, UsersService];
diff --git a/frontend/src/api/api/taskseries.service.ts b/frontend/src/api/api/taskseries.service.ts
new file mode 100644
index 0000000..722e542
--- /dev/null
+++ b/frontend/src/api/api/taskseries.service.ts
@@ -0,0 +1,226 @@
+/**
+ * API Title
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 1.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+/* tslint:disable:no-unused-variable member-ordering */
+
+import { Inject, Injectable, Optional }                      from '@angular/core';
+import { HttpClient, HttpHeaders, HttpParams,
+         HttpResponse, HttpEvent, HttpParameterCodec, HttpContext 
+        }       from '@angular/common/http';
+import { CustomHttpParameterCodec }                          from '../encoder';
+import { Observable }                                        from 'rxjs';
+
+import { SimpleStatusResponse } from '../model/models';
+import { TaskRepeatDayInfo } from '../model/models';
+import { TaskRepeatWeekInfo } from '../model/models';
+
+import { BASE_PATH, COLLECTION_FORMATS }                     from '../variables';
+import { Configuration }                                     from '../configuration';
+
+
+
+@Injectable({
+  providedIn: 'root'
+})
+export class TaskseriesService {
+
+    protected basePath = 'http://127.0.0.1:8080/api';
+    public defaultHeaders = new HttpHeaders();
+    public configuration = new Configuration();
+    public encoder: HttpParameterCodec;
+
+    constructor(protected httpClient: HttpClient, @Optional()@Inject(BASE_PATH) basePath: string, @Optional() configuration: Configuration) {
+        if (configuration) {
+            this.configuration = configuration;
+        }
+        if (typeof this.configuration.basePath !== 'string') {
+            if (typeof basePath !== 'string') {
+                basePath = this.basePath;
+            }
+            this.configuration.basePath = basePath;
+        }
+        this.encoder = this.configuration.encoder || new CustomHttpParameterCodec();
+    }
+
+
+    private addToHttpParams(httpParams: HttpParams, value: any, key?: string): HttpParams {
+        if (typeof value === "object" && value instanceof Date === false) {
+            httpParams = this.addToHttpParamsRecursive(httpParams, value);
+        } else {
+            httpParams = this.addToHttpParamsRecursive(httpParams, value, key);
+        }
+        return httpParams;
+    }
+
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
+        if (typeof value === "object") {
+            if (Array.isArray(value)) {
+                (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));
+            } else if (value instanceof Date) {
+                if (key != null) {
+                    httpParams = httpParams.append(key,
+                        (value as Date).toISOString().substr(0, 10));
+                } else {
+                   throw Error("key may not be null if value is Date");
+                }
+            } else {
+                Object.keys(value).forEach( k => httpParams = this.addToHttpParamsRecursive(
+                    httpParams, value[k], key != null ? `${key}.${k}` : k));
+            }
+        } else if (key != null) {
+            httpParams = httpParams.append(key, value);
+        } else {
+            throw Error("key may not be null if value is not object or array");
+        }
+        return httpParams;
+    }
+
+    /**
+     * daily repeating task creation
+     * Creates a daily repeating task
+     * @param taskID internal id of taskgroup
+     * @param taskRepeatDayInfo 
+     * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+     * @param reportProgress flag to report request and response progress.
+     */
+    public tasksTaskIDTaskseriesDailyPost(taskID: number, taskRepeatDayInfo?: TaskRepeatDayInfo, observe?: 'body', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<SimpleStatusResponse>;
+    public tasksTaskIDTaskseriesDailyPost(taskID: number, taskRepeatDayInfo?: TaskRepeatDayInfo, observe?: 'response', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpResponse<SimpleStatusResponse>>;
+    public tasksTaskIDTaskseriesDailyPost(taskID: number, taskRepeatDayInfo?: TaskRepeatDayInfo, observe?: 'events', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpEvent<SimpleStatusResponse>>;
+    public tasksTaskIDTaskseriesDailyPost(taskID: number, taskRepeatDayInfo?: TaskRepeatDayInfo, observe: any = 'body', reportProgress: boolean = false, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<any> {
+        if (taskID === null || taskID === undefined) {
+            throw new Error('Required parameter taskID was null or undefined when calling tasksTaskIDTaskseriesDailyPost.');
+        }
+
+        let localVarHeaders = this.defaultHeaders;
+
+        let localVarCredential: string | undefined;
+        // authentication (API_TOKEN) required
+        localVarCredential = this.configuration.lookupCredential('API_TOKEN');
+        if (localVarCredential) {
+            localVarHeaders = localVarHeaders.set('Authorization', 'Bearer ' + localVarCredential);
+        }
+
+        let localVarHttpHeaderAcceptSelected: string | undefined = options && options.httpHeaderAccept;
+        if (localVarHttpHeaderAcceptSelected === undefined) {
+            // to determine the Accept header
+            const httpHeaderAccepts: string[] = [
+                'application/json'
+            ];
+            localVarHttpHeaderAcceptSelected = this.configuration.selectHeaderAccept(httpHeaderAccepts);
+        }
+        if (localVarHttpHeaderAcceptSelected !== undefined) {
+            localVarHeaders = localVarHeaders.set('Accept', localVarHttpHeaderAcceptSelected);
+        }
+
+        let localVarHttpContext: HttpContext | undefined = options && options.context;
+        if (localVarHttpContext === undefined) {
+            localVarHttpContext = new HttpContext();
+        }
+
+
+        // to determine the Content-Type header
+        const consumes: string[] = [
+            'application/json'
+        ];
+        const httpContentTypeSelected: string | undefined = this.configuration.selectHeaderContentType(consumes);
+        if (httpContentTypeSelected !== undefined) {
+            localVarHeaders = localVarHeaders.set('Content-Type', httpContentTypeSelected);
+        }
+
+        let responseType_: 'text' | 'json' = 'json';
+        if(localVarHttpHeaderAcceptSelected && localVarHttpHeaderAcceptSelected.startsWith('text')) {
+            responseType_ = 'text';
+        }
+
+        return this.httpClient.post<SimpleStatusResponse>(`${this.configuration.basePath}/tasks/${encodeURIComponent(String(taskID))}/taskseries/daily`,
+            taskRepeatDayInfo,
+            {
+                context: localVarHttpContext,
+                responseType: <any>responseType_,
+                withCredentials: this.configuration.withCredentials,
+                headers: localVarHeaders,
+                observe: observe,
+                reportProgress: reportProgress
+            }
+        );
+    }
+
+    /**
+     * daily repeating task creation
+     * Creates a daily repeating task
+     * @param taskRepeatWeekInfo 
+     * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+     * @param reportProgress flag to report request and response progress.
+     */
+    public tasksTaskseriesWeeklyPost(taskRepeatWeekInfo?: TaskRepeatWeekInfo, observe?: 'body', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<SimpleStatusResponse>;
+    public tasksTaskseriesWeeklyPost(taskRepeatWeekInfo?: TaskRepeatWeekInfo, observe?: 'response', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpResponse<SimpleStatusResponse>>;
+    public tasksTaskseriesWeeklyPost(taskRepeatWeekInfo?: TaskRepeatWeekInfo, observe?: 'events', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpEvent<SimpleStatusResponse>>;
+    public tasksTaskseriesWeeklyPost(taskRepeatWeekInfo?: TaskRepeatWeekInfo, observe: any = 'body', reportProgress: boolean = false, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<any> {
+
+        let localVarHeaders = this.defaultHeaders;
+
+        let localVarCredential: string | undefined;
+        // authentication (API_TOKEN) required
+        localVarCredential = this.configuration.lookupCredential('API_TOKEN');
+        if (localVarCredential) {
+            localVarHeaders = localVarHeaders.set('Authorization', 'Bearer ' + localVarCredential);
+        }
+
+        let localVarHttpHeaderAcceptSelected: string | undefined = options && options.httpHeaderAccept;
+        if (localVarHttpHeaderAcceptSelected === undefined) {
+            // to determine the Accept header
+            const httpHeaderAccepts: string[] = [
+                'application/json'
+            ];
+            localVarHttpHeaderAcceptSelected = this.configuration.selectHeaderAccept(httpHeaderAccepts);
+        }
+        if (localVarHttpHeaderAcceptSelected !== undefined) {
+            localVarHeaders = localVarHeaders.set('Accept', localVarHttpHeaderAcceptSelected);
+        }
+
+        let localVarHttpContext: HttpContext | undefined = options && options.context;
+        if (localVarHttpContext === undefined) {
+            localVarHttpContext = new HttpContext();
+        }
+
+
+        // to determine the Content-Type header
+        const consumes: string[] = [
+            'application/json'
+        ];
+        const httpContentTypeSelected: string | undefined = this.configuration.selectHeaderContentType(consumes);
+        if (httpContentTypeSelected !== undefined) {
+            localVarHeaders = localVarHeaders.set('Content-Type', httpContentTypeSelected);
+        }
+
+        let responseType_: 'text' | 'json' = 'json';
+        if(localVarHttpHeaderAcceptSelected && localVarHttpHeaderAcceptSelected.startsWith('text')) {
+            responseType_ = 'text';
+        }
+
+        return this.httpClient.post<SimpleStatusResponse>(`${this.configuration.basePath}/tasks/taskseries/weekly`,
+            taskRepeatWeekInfo,
+            {
+                context: localVarHttpContext,
+                responseType: <any>responseType_,
+                withCredentials: this.configuration.withCredentials,
+                headers: localVarHeaders,
+                observe: observe,
+                reportProgress: reportProgress
+            }
+        );
+    }
+
+}
diff --git a/frontend/src/api/model/models.ts b/frontend/src/api/model/models.ts
index 028c0ee..12edcd1 100644
--- a/frontend/src/api/model/models.ts
+++ b/frontend/src/api/model/models.ts
@@ -29,6 +29,9 @@ export * from './simpleStatusResponse';
 export * from './taskEntityInfo';
 export * from './taskFieldInfo';
 export * from './taskOverviewInfo';
+export * from './taskRepeatDayInfo';
+export * from './taskRepeatWeekDayInfo';
+export * from './taskRepeatWeekInfo';
 export * from './taskScheduleStopResponse';
 export * from './taskShortInfo';
 export * from './taskTaskgroupInfo';
diff --git a/frontend/src/api/model/ntfyInformation.ts b/frontend/src/api/model/ntfyInformation.ts
index 5919525..1803174 100644
--- a/frontend/src/api/model/ntfyInformation.ts
+++ b/frontend/src/api/model/ntfyInformation.ts
@@ -23,7 +23,7 @@ export interface NtfyInformation {
     /**
      * username of ntfy account for publishing news
      */
-    ntfy_user: string;
+    ntfy_user?: string;
     /**
      * token to ntfy useraccount
      */
diff --git a/frontend/src/api/model/taskEntityInfo.ts b/frontend/src/api/model/taskEntityInfo.ts
index e97b949..3a2b2d0 100644
--- a/frontend/src/api/model/taskEntityInfo.ts
+++ b/frontend/src/api/model/taskEntityInfo.ts
@@ -56,5 +56,9 @@ export interface TaskEntityInfo {
      * determines whether the task has schedules that can be started
      */
     hasPlannedSchedules: boolean;
+    /**
+     * determines whether the task is associated with a taskserie
+     */
+    hasTaskSerie: boolean;
 }
 
diff --git a/frontend/src/api/model/taskRepeatDayInfo.ts b/frontend/src/api/model/taskRepeatDayInfo.ts
new file mode 100644
index 0000000..31b219e
--- /dev/null
+++ b/frontend/src/api/model/taskRepeatDayInfo.ts
@@ -0,0 +1,33 @@
+/**
+ * API Title
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 1.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+export interface TaskRepeatDayInfo { 
+    /**
+     * number repeating days
+     */
+    offset: number;
+    deadlineStrategy: TaskRepeatDayInfo.DeadlineStrategyEnum;
+    /**
+     * Date until the tasks repeat
+     */
+    endingDate: string;
+}
+export namespace TaskRepeatDayInfo {
+    export type DeadlineStrategyEnum = 'DEADLINE_EQUAL_START' | 'DEADLINE_FIT_START';
+    export const DeadlineStrategyEnum = {
+        EqualStart: 'DEADLINE_EQUAL_START' as DeadlineStrategyEnum,
+        FitStart: 'DEADLINE_FIT_START' as DeadlineStrategyEnum
+    };
+}
+
+
diff --git a/frontend/src/api/model/taskRepeatWeekDayInfo.ts b/frontend/src/api/model/taskRepeatWeekDayInfo.ts
new file mode 100644
index 0000000..ed3390e
--- /dev/null
+++ b/frontend/src/api/model/taskRepeatWeekDayInfo.ts
@@ -0,0 +1,24 @@
+/**
+ * API Title
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 1.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+export interface TaskRepeatWeekDayInfo { 
+    /**
+     * number repeating days
+     */
+    offset: number;
+    /**
+     * internal identifier of task
+     */
+    taskID: number;
+}
+
diff --git a/frontend/src/api/model/taskRepeatWeekInfo.ts b/frontend/src/api/model/taskRepeatWeekInfo.ts
new file mode 100644
index 0000000..6803c5c
--- /dev/null
+++ b/frontend/src/api/model/taskRepeatWeekInfo.ts
@@ -0,0 +1,31 @@
+/**
+ * API Title
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 1.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+import { TaskRepeatWeekDayInfo } from './taskRepeatWeekDayInfo';
+
+
+export interface TaskRepeatWeekInfo { 
+    deadlineStrategy: TaskRepeatWeekInfo.DeadlineStrategyEnum;
+    /**
+     * Date until the tasks repeat
+     */
+    endDate: string;
+    weekDayInfos: Array<TaskRepeatWeekDayInfo>;
+}
+export namespace TaskRepeatWeekInfo {
+    export type DeadlineStrategyEnum = 'DEADLINE_EQUAL_START' | 'DEADLINE_FIT_START';
+    export const DeadlineStrategyEnum = {
+        EqualStart: 'DEADLINE_EQUAL_START' as DeadlineStrategyEnum,
+        FitStart: 'DEADLINE_FIT_START' as DeadlineStrategyEnum
+    };
+}
+
+
diff --git a/frontend/src/app/app.module.ts b/frontend/src/app/app.module.ts
index 61f2d42..71ac5f2 100644
--- a/frontend/src/app/app.module.ts
+++ b/frontend/src/app/app.module.ts
@@ -91,6 +91,9 @@ import {MatGridListModule} from "@angular/material/grid-list";
 import { StopScheduleManuallyComponent } from './dashboard/active-schedule/stop-schedule-manually/stop-schedule-manually.component';
 import { ConnectionSettingsComponent } from './user-settings/connection-settings/connection-settings.component';
 import { NtfySettingsComponent } from './user-settings/connection-settings/ntfy-settings/ntfy-settings.component';
+import { TaskSeriesCreatorComponent } from './tasks/task-series-creator/task-series-creator.component';
+import {MatStepperModule} from "@angular/material/stepper";
+import { TaskWeeklySeriesCreatorComponent } from './tasks/task-weekly-series-creator/task-weekly-series-creator.component';
 @NgModule({
   declarations: [
     AppComponent,
@@ -138,6 +141,8 @@ import { NtfySettingsComponent } from './user-settings/connection-settings/ntfy-
     StopScheduleManuallyComponent,
     ConnectionSettingsComponent,
     NtfySettingsComponent,
+    TaskSeriesCreatorComponent,
+    TaskWeeklySeriesCreatorComponent,
   ],
   imports: [
     BrowserModule,
@@ -181,6 +186,7 @@ import { NtfySettingsComponent } from './user-settings/connection-settings/ntfy-
     NgApexchartsModule,
     MatButtonToggleModule,
     MatGridListModule,
+    MatStepperModule,
   ],
   providers: [
     HttpClientModule,
diff --git a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.css b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.css
index 532013d..542e3f2 100644
--- a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.css
+++ b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.css
@@ -20,7 +20,7 @@ td, th {
   margin: 0 auto;
 }
 
-.mat-column-status, .mat-column-eta {
+.mat-column-status, .mat-column-eta, .mat-column-select {
   width: 32px;
   text-align: left;
 }
diff --git a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.html b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.html
index d8d33bc..9d04aaa 100644
--- a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.html
+++ b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.html
@@ -8,6 +8,23 @@
 
 <div class="mat-elevation-z8">
   <table mat-table [dataSource]="datasource" matSort>
+    <!-- Checkbox Column -->
+    <ng-container matColumnDef="select">
+      <th mat-header-cell *matHeaderCellDef>
+        <mat-checkbox (change)="$event ? toggleAllRows() : null"
+                      [checked]="selection.hasValue() && isAllSelected()"
+                      [indeterminate]="selection.hasValue() && !isAllSelected()">
+        </mat-checkbox>
+      </th>
+      <td mat-cell *matCellDef="let row">
+        <mat-checkbox (click)="$event.stopPropagation()"
+                      (change)="$event ? selection.toggle(row) : null"
+                      [checked]="selection.isSelected(row)"
+                      [disabled]="row.hasTaskSerie">
+        </mat-checkbox>
+      </td>
+    </ng-container>
+
     <ng-container matColumnDef="name">
       <th mat-header-cell *matHeaderCellDef mat-sort-header> Name </th>
       <td mat-cell *matCellDef="let task">
@@ -45,7 +62,9 @@
       </td>
     </ng-container>
     <ng-container matColumnDef="delete">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header></th>
+      <th mat-header-cell *matHeaderCellDef mat-sort-header>
+        <button mat-icon-button color="primary" (click)="repeatSelectedTasks()" [disabled]="selection.isEmpty()"><mat-icon>event_repeat</mat-icon></button>
+      </th>
       <td mat-cell *matCellDef="let task">
         <button mat-icon-button color="warn" (click)="deleteTask(task)"><mat-icon>delete</mat-icon></button>
       </td>
diff --git a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
index df32cb8..49b5e14 100644
--- a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
+++ b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
@@ -10,6 +10,8 @@ import {MatSnackBar} from "@angular/material/snack-bar";
 import {ClearTaskDialogComponent, ClearTaskDialogData} from "../clear-task-dialog/clear-task-dialog.component";
 import * as moment from "moment/moment";
 import {TaskStatus, TaskStatusService} from "../task-status.service";
+import {SelectionModel} from "@angular/cdk/collections";
+import {TaskWeeklySeriesCreatorComponent} from "../task-weekly-series-creator/task-weekly-series-creator.component";
 
 @Component({
   selector: 'app-task-dashboard',
@@ -19,15 +21,7 @@ import {TaskStatus, TaskStatusService} from "../task-status.service";
 export class TaskDashboardComponent implements OnChanges{
   ngOnChanges(): void {
     if(this.taskgroupID != undefined) {
-      this.taskService.tasksTaskgroupIDStatusGet(this.taskgroupID!, "all").subscribe({
-        next: resp => {
-          this.datasource = new MatTableDataSource<TaskEntityInfo>(resp);
-          this.datasource.paginator = this.paginator!;
-          this.datasource.sort = this.sort!;
-
-          resp.forEach(task => console.log(task))
-        }
-      })
+      this.fetchTasks()
     }
   }
 
@@ -35,9 +29,29 @@ export class TaskDashboardComponent implements OnChanges{
   @ViewChild(MatPaginator) paginator: MatPaginator | undefined
   @ViewChild(MatSort) sort: MatSort | undefined
 
-  displayedColumns: string[] = ['status', 'name', 'eta', 'start', 'deadline', 'finished', 'edit', 'delete'];
+  displayedColumns: string[] = ['select', 'status', 'name', 'eta', 'start', 'deadline', 'finished', 'edit', 'delete'];
   datasource: MatTableDataSource<TaskEntityInfo> = new MatTableDataSource<TaskEntityInfo>();
 
+  selection = new SelectionModel<TaskEntityInfo>(true, []);
+
+  /** Whether the number of selected elements matches the total number of rows. */
+  isAllSelected() {
+    const numSelected = this.selection.selected.length;
+    const numRows = this.datasource.data.length;
+    return numSelected === numRows;
+  }
+
+  /** Selects all rows if they are not all selected; otherwise clear selection. */
+  toggleAllRows() {
+    if (this.isAllSelected()) {
+      this.selection.clear();
+      return;
+    }
+
+    this.selection.select(...this.datasource.data.filter(task => !task.hasTaskSerie));
+  }
+
+
   constructor(private taskService: TaskService,
               private dialog: MatDialog,
               private snackbar: MatSnackBar,
@@ -107,4 +121,30 @@ export class TaskDashboardComponent implements OnChanges{
   }
 
   protected readonly TaskStatus = TaskStatus;
+
+  repeatSelectedTasks() {
+    const selectedTasks = this.selection.selected;
+    const dialogRef = this.dialog.open(TaskWeeklySeriesCreatorComponent, {
+      data: selectedTasks,
+      minWidth: "400px"
+    });
+    dialogRef.afterClosed().subscribe(res => {
+      if(res) {
+       this.fetchTasks()
+      }
+    })
+
+  }
+
+  fetchTasks() {
+    this.taskService.tasksTaskgroupIDStatusGet(this.taskgroupID!, "all").subscribe({
+      next: resp => {
+        this.datasource = new MatTableDataSource<TaskEntityInfo>(resp);
+        this.datasource.paginator = this.paginator!;
+        this.datasource.sort = this.sort!;
+
+        resp.forEach(task => console.log(task))
+      }
+    })
+  }
 }
diff --git a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
index d745f2b..24038f3 100644
--- a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
+++ b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
@@ -29,7 +29,7 @@
           <button mat-flat-button class="borderless-btn" color="primary" [routerLink]="['/taskgroups', taskgroup!.taskgroupID, 'tasks', task!.taskID, 'schedule']">Schedule</button>
           <button mat-flat-button class="yellowBtn" (click)="startTaskNow()">Start now</button>
           <button mat-flat-button class="grayBtn" (click)="openTaskEditor()">Edit</button>
-          <!--<button mat-raised-button>Copy</button>-->
+          <button mat-flat-button class="lightBlueBtn" *ngIf="!task.hasTaskSerie" (click)="openRepeatingTaskEditor()">Copy</button>
           <button mat-flat-button class="greenBtn"  *ngIf="task!.finishable" (click)="finishTask()">{{task!.finished ? 'Reopen':'Finish'}}</button>
         </div>
 
diff --git a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.ts b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.ts
index e28a744..d557009 100644
--- a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.ts
+++ b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.ts
@@ -17,6 +17,7 @@ import {TaskEditorData} from "../task-editor/TaskEditorData";
 import * as moment from "moment";
 import {ScheduleDashboardComponent} from "../../schedules/schedule-dashboard/schedule-dashboard.component";
 import {TaskStatusService} from "../task-status.service";
+import {TaskSeriesCreatorComponent} from "../task-series-creator/task-series-creator.component";
 
 @Component({
   selector: 'app-task-detail-overview',
@@ -158,4 +159,11 @@ export class TaskDetailOverviewComponent implements OnInit {
       }
     })
   }
+
+  openRepeatingTaskEditor() {
+    const dialogRef = this.dialog.open(TaskSeriesCreatorComponent, {
+      data: this.task!,
+      minWidth: "400px"
+    })
+  }
 }
diff --git a/frontend/src/app/tasks/task-series-creator/task-series-creator.component.css b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.css
new file mode 100644
index 0000000..e69de29
diff --git a/frontend/src/app/tasks/task-series-creator/task-series-creator.component.html b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.html
new file mode 100644
index 0000000..e000da5
--- /dev/null
+++ b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.html
@@ -0,0 +1,37 @@
+<h1 mat-dialog-title>Create Task-Series</h1>
+<mat-stepper linear="linear" #stepper orientation="vertical">
+  <mat-step [stepControl]="dailyFormGroup">
+    <form [formGroup]="dailyFormGroup">
+      <ng-template matStepLabel>Define Repeating Information</ng-template>
+      <mat-form-field appearance="outline" class="long-form">
+        <mat-label>Offset</mat-label>
+        <input matInput formControlName="offsetCtrl" type="number" (keypress)="($event.charCode >= 48 && $event.charCode < 58)">
+      </mat-form-field>
+      <mat-form-field appearance="outline" class="long-form">
+        <mat-label>Deadline Strategy</mat-label>
+        <mat-select formControlName="deadlineStrategyCtrl">
+          <mat-option value="DEADLINE_FIT_START">Fit Next Start</mat-option>
+          <mat-option value="DEADLINE_EQUAL_START">Equal Same Start</mat-option>
+        </mat-select>
+      </mat-form-field>
+      <div>
+        <button mat-raised-button color="primary" matStepperNext>Next</button>
+      </div>
+    </form>
+  </mat-step>
+  <mat-step [stepControl]="endDateFormGroup">
+    <form [formGroup]="endDateFormGroup">
+      <ng-template matStepLabel>When should the TaskSerie end?</ng-template>
+      <mat-form-field appearance="outline" class="long-form">
+        <mat-label>Choose a date</mat-label>
+        <input matInput [matDatepicker]="picker" formControlName="endDateCtrl">
+        <mat-hint>MM/DD/YYYY</mat-hint>
+        <mat-datepicker-toggle matIconSuffix [for]="picker"></mat-datepicker-toggle>
+        <mat-datepicker #picker></mat-datepicker>
+      </mat-form-field>
+      <div>
+        <button mat-raised-button color="primary" (click)="save()">Submit</button>
+      </div>
+    </form>
+  </mat-step>
+</mat-stepper>
diff --git a/frontend/src/app/tasks/task-series-creator/task-series-creator.component.spec.ts b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.spec.ts
new file mode 100644
index 0000000..00686e8
--- /dev/null
+++ b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.spec.ts
@@ -0,0 +1,21 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TaskSeriesCreatorComponent } from './task-series-creator.component';
+
+describe('TaskSeriesCreatorComponent', () => {
+  let component: TaskSeriesCreatorComponent;
+  let fixture: ComponentFixture<TaskSeriesCreatorComponent>;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      declarations: [TaskSeriesCreatorComponent]
+    });
+    fixture = TestBed.createComponent(TaskSeriesCreatorComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
diff --git a/frontend/src/app/tasks/task-series-creator/task-series-creator.component.ts b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.ts
new file mode 100644
index 0000000..ed27ba5
--- /dev/null
+++ b/frontend/src/app/tasks/task-series-creator/task-series-creator.component.ts
@@ -0,0 +1,52 @@
+import {Component, Inject} from '@angular/core';
+import {FormBuilder, Validators} from "@angular/forms";
+import {TaskEntityInfo, TaskRepeatDayInfo, TaskseriesService} from "../../../api";
+import {MAT_DIALOG_DATA, MatDialogRef} from "@angular/material/dialog";
+import DeadlineStrategyEnum = TaskRepeatDayInfo.DeadlineStrategyEnum;
+import * as moment from "moment";
+
+
+@Component({
+  selector: 'app-task-series-creator',
+  templateUrl: './task-series-creator.component.html',
+  styleUrls: ['./task-series-creator.component.css']
+})
+export class TaskSeriesCreatorComponent {
+
+  dailyFormGroup = this._formBuilder.group({
+    offsetCtrl: ['', Validators.required],
+    deadlineStrategyCtrl: ['', Validators.required]
+  })
+
+  endDateFormGroup = this._formBuilder.group({
+    endDateCtrl: ['', Validators.required]
+  })
+
+  constructor(private _formBuilder: FormBuilder,
+              private taskSeriesService: TaskseriesService,
+              @Inject(MAT_DIALOG_DATA) public task: TaskEntityInfo,
+              private dialogRef: MatDialogRef<TaskSeriesCreatorComponent>) {
+
+  }
+
+  save() {
+    this.taskSeriesService.tasksTaskIDTaskseriesDailyPost(this.task.taskID,{
+      offset: Number(this.dailyFormGroup.get('offsetCtrl')!.value!),
+      deadlineStrategy: this.convertDeadlineStrategyCtrlToDeadlineEnum(),
+      endingDate: moment( this.endDateFormGroup.get('endDateCtrl')!.value!).format('YYYY-MM-DDTHH:mm:ss.SSSZ')
+    }).subscribe({
+      next: resp => {
+        this.dialogRef.close();
+      }
+    })
+  }
+
+  convertDeadlineStrategyCtrlToDeadlineEnum() {
+    const deadlineStrategy = this.dailyFormGroup.get('deadlineStrategyCtrl')!.value;
+    if(deadlineStrategy === DeadlineStrategyEnum.EqualStart) {
+      return DeadlineStrategyEnum.EqualStart;
+    } else {
+      return DeadlineStrategyEnum.FitStart;
+    }
+  }
+}
diff --git a/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.css b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.css
new file mode 100644
index 0000000..a91ad7f
--- /dev/null
+++ b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.css
@@ -0,0 +1,10 @@
+#deadline-strategy-form {
+  margin-top: 10px;
+  padding-left: 10px;
+  padding-right: 10px;
+}
+
+#endDate-form {
+  padding-left: 10px;
+  padding-right: 10px;
+}
diff --git a/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.html b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.html
new file mode 100644
index 0000000..2d18e9b
--- /dev/null
+++ b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.html
@@ -0,0 +1,50 @@
+<h1 mat-dialog-title>Configure Weekly Repeating Tasks</h1>
+<form [formGroup]="repeatingOffsetForm" *ngIf="repeatingOffsetForm != undefined">
+  <div formArrayName="offsets">
+    <mat-accordion>
+      <div *ngFor="let task of offsets.controls; let i = index" [formGroupName]="i">
+        <mat-expansion-panel hideToggle>
+          <mat-expansion-panel-header>
+            <mat-panel-title>{{getDayOfWeek(tasks[i].startDate)}}</mat-panel-title>
+            <mat-panel-description>{{formatDate(tasks[i].startDate)}}</mat-panel-description>
+          </mat-expansion-panel-header>
+          <p>Taskname: {{tasks[i].taskName}}</p>
+          <p>Eta: {{tasks[i].eta}} Minutes</p>
+          <p>Startdate: {{formatDate(tasks[i].startDate)}}</p>
+          <p>Deadline: {{formatDate(tasks[i].deadline)}}</p>
+          <mat-form-field appearance="outline" class="long-form">
+            <mat-label>Repeating-Offset</mat-label>
+            <input matInput formControlName="offsetCtrl">
+            <mat-hint>Number of weeks until the task is to be repeated</mat-hint>
+          </mat-form-field>
+          <mat-action-row>
+            <button mat-icon-button color="warn" (click)="removeTaskFromRepeatingList(tasks[i], i)"><mat-icon>delete</mat-icon></button>
+          </mat-action-row>
+        </mat-expansion-panel>
+      </div>
+    </mat-accordion>
+  </div>
+  <mat-form-field appearance="outline" class="long-form" id="deadline-strategy-form">
+    <mat-label>Deadline-Strategy</mat-label>
+    <mat-select formControlName="deadlineStrategyCtrl">
+      <mat-option *ngFor="let deadlineStrategy of availableDeadlineStrategys" [value]="deadlineStrategy">
+        {{deadlineStrategy}}
+      </mat-option>
+    </mat-select>
+  </mat-form-field>
+
+  <mat-form-field appearance="outline" class="long-form" id="endDate-form">
+    <mat-label>Ending Date</mat-label>
+    <input matInput [matDatepicker]="picker" formControlName="endingDateCtrl">
+    <mat-hint>MM/DD/YYYY</mat-hint>
+    <mat-datepicker-toggle matIconSuffix [for]="picker"></mat-datepicker-toggle>
+    <mat-datepicker #picker></mat-datepicker>
+  </mat-form-field>
+
+  <div mat-dialog-actions align="end">
+    <button mat-raised-button (click)="cancel()">Cancel</button>
+    <button mat-raised-button color="primary" [disabled]="repeatingOffsetForm.invalid" (click)="saveRepeatingTask()">Save</button>
+  </div>
+</form>
+
+
diff --git a/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.spec.ts b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.spec.ts
new file mode 100644
index 0000000..4c28792
--- /dev/null
+++ b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.spec.ts
@@ -0,0 +1,21 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TaskWeeklySeriesCreatorComponent } from './task-weekly-series-creator.component';
+
+describe('TaskWeeklySeriesCreatorComponent', () => {
+  let component: TaskWeeklySeriesCreatorComponent;
+  let fixture: ComponentFixture<TaskWeeklySeriesCreatorComponent>;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      declarations: [TaskWeeklySeriesCreatorComponent]
+    });
+    fixture = TestBed.createComponent(TaskWeeklySeriesCreatorComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
diff --git a/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.ts b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.ts
new file mode 100644
index 0000000..9b40131
--- /dev/null
+++ b/frontend/src/app/tasks/task-weekly-series-creator/task-weekly-series-creator.component.ts
@@ -0,0 +1,83 @@
+import {Component, Inject, OnInit} from '@angular/core';
+import {MAT_DIALOG_DATA, MatDialogRef} from "@angular/material/dialog";
+import {TaskEntityInfo, TaskRepeatDayInfo, TaskRepeatWeekDayInfo, TaskseriesService} from "../../../api";
+import * as moment from "moment";
+import {FormArray, FormBuilder, FormGroup, Validators} from "@angular/forms";
+import DeadlineStrategyEnum = TaskRepeatDayInfo.DeadlineStrategyEnum;
+
+
+@Component({
+  selector: 'app-task-weekly-series-creator',
+  templateUrl: './task-weekly-series-creator.component.html',
+  styleUrls: ['./task-weekly-series-creator.component.css']
+})
+export class TaskWeeklySeriesCreatorComponent implements OnInit{
+
+  repeatingOffsetForm: FormGroup | undefined
+  availableDeadlineStrategys: DeadlineStrategyEnum[] = ["DEADLINE_EQUAL_START", "DEADLINE_FIT_START"]
+
+  constructor(private dialogRef: MatDialogRef<TaskWeeklySeriesCreatorComponent>,
+              private taskRepeatingService: TaskseriesService,
+              @Inject(MAT_DIALOG_DATA) public tasks: TaskEntityInfo[],
+              private formbuilder: FormBuilder) {
+  }
+
+  ngOnInit(): void {
+    this.repeatingOffsetForm = this.formbuilder.group({
+      offsets: this.formbuilder.array(this.tasks.map(task => this.formbuilder.group({
+        offsetCtrl: ['', [Validators.required, Validators.min(1)]]
+      }))),
+      deadlineStrategyCtrl: ['', Validators.required],
+      endingDateCtrl: ['', Validators.required]
+
+    })
+  }
+
+
+
+  getDayOfWeek(date: string) {
+    return moment(date).format("dddd")
+  }
+
+  formatDate(date: string): string {
+    return moment(date).format("dd, DD. MMMM YYYY")
+  }
+
+  removeTaskFromRepeatingList(task: TaskEntityInfo, formIndex: number) {
+    this.tasks = this.tasks.filter(t => t.taskID !== task.taskID);
+    this.deleteOffset(formIndex)
+  }
+
+  get offsets() {
+    return this.repeatingOffsetForm!.controls["offsets"] as FormArray
+  }
+
+  deleteOffset(taskIndex: number) {
+    this.offsets.removeAt(taskIndex);
+  }
+
+  saveRepeatingTask() {
+    const weekDayInfos: TaskRepeatWeekDayInfo[] = []
+    const formArrayValues: {offsetCtrl: string}[] = this.offsets.value
+    for(let i=0; i<formArrayValues.length; i++) {
+      weekDayInfos.push({
+        taskID: this.tasks[i].taskID,
+        offset: Number(formArrayValues[i].offsetCtrl) * 7
+      })
+    }
+
+    this.taskRepeatingService.tasksTaskseriesWeeklyPost({
+      deadlineStrategy: this.repeatingOffsetForm!.controls['deadlineStrategyCtrl']!.value!,
+      endDate: moment(this.repeatingOffsetForm!.controls['endingDateCtrl']!.value!).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
+      weekDayInfos: weekDayInfos
+    }).subscribe({
+      next: resp => {
+        this.dialogRef.close(true)
+      }
+    })
+  }
+
+  cancel() {
+    this.dialogRef.close(false);
+  }
+}
diff --git a/frontend/src/app/user-settings/connection-settings/ntfy-settings/ntfy-settings.component.ts b/frontend/src/app/user-settings/connection-settings/ntfy-settings/ntfy-settings.component.ts
index 3b9e8ee..d7ad51f 100644
--- a/frontend/src/app/user-settings/connection-settings/ntfy-settings/ntfy-settings.component.ts
+++ b/frontend/src/app/user-settings/connection-settings/ntfy-settings/ntfy-settings.component.ts
@@ -24,7 +24,7 @@ export class NtfySettingsComponent {
       next: resp => {
         this.host_formCtrl.setValue(resp.ntfy_host);
         this.topic_formCtrl.setValue(resp.ntfy_topic);
-        this.user_formCtrl.setValue(resp.ntfy_user);
+        this.user_formCtrl.setValue(resp.ntfy_user!);
         this.token_formCtrl.setValue(resp.ntfy_token!);
       }
     })
diff --git a/openapi.yaml b/openapi.yaml
index 2001027..2ff5ea4 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -2073,6 +2073,84 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/SimpleStatusResponse'
+  /tasks/{taskID}/taskseries/daily:
+    post:
+      security:
+        - API_TOKEN: []
+      tags:
+        - taskseries
+      description: Creates a daily repeating task
+      summary: daily repeating task creation
+      parameters:
+        - name: taskID
+          in: path
+          description: internal id of taskgroup
+          required: true
+          schema:
+            type: number
+            example: 1
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/TaskRepeatDayInfo'
+      responses:
+        200:
+          description: Operation successfull
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+        403:
+          description: No permission
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+        404:
+          description: Task not found
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+        400:
+          description: Invalid deadlineStrategy
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+  /tasks/taskseries/weekly:
+    post:
+      security:
+        - API_TOKEN: []
+      tags:
+        - taskseries
+      description: Creates a daily repeating task
+      summary: daily repeating task creation
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/TaskRepeatWeekInfo'
+      responses:
+        200:
+          description: Operation successfull
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+        403:
+          description: No permission
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
+        404:
+          description: Task not found
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SimpleStatusResponse'
 
       
 components:
@@ -2336,6 +2414,7 @@ components:
         - finishable
         - hasActiveSchedules
         - hasPlannedSchedules
+        - hasTaskSerie
       additionalProperties: false
       properties:
         taskID:
@@ -2380,6 +2459,10 @@ components:
         hasPlannedSchedules:
           type: boolean
           description: determines whether the task has schedules that can be started
+        hasTaskSerie:
+          type: boolean
+          description: determines whether the task is associated with a taskserie
+          example: false
     TaskTaskgroupInfo:
       required:
         - taskID
@@ -2779,4 +2862,63 @@ components:
           example: password
         ntfy_token:
           type: string
-          description: token to ntfy useraccount
\ No newline at end of file
+          description: token to ntfy useraccount
+    TaskRepeatDayInfo:
+      required:
+        - offset
+        - deadlineStrategy
+        - endingDate
+      additionalProperties: false
+      properties:
+        offset:
+          type: number
+          description: number repeating days
+          example: 7
+          minimum: 1
+        deadlineStrategy:
+          type: string
+          enum:
+            - DEADLINE_EQUAL_START
+            - DEADLINE_FIT_START
+        endingDate:
+          type: string
+          format: date
+          description: Date until the tasks repeat
+    TaskRepeatWeekDayInfo:
+      required:
+        - offset
+        - taskID
+      additionalProperties: false
+      properties:
+        offset:
+          type: number
+          description: number repeating days
+          example: 7
+          minimum: 1
+        taskID:
+          type: number
+          description: internal identifier of task
+          example: 1
+    TaskRepeatWeekInfo:
+      required:
+        - weekDayInfos
+        - deadlineStrategy
+        - endDate
+      additionalProperties: false
+      properties:
+        deadlineStrategy:
+          type: string
+          enum:
+            - DEADLINE_EQUAL_START
+            - DEADLINE_FIT_START
+        endDate:
+          type: string
+          format: date
+          description: Date until the tasks repeat
+        weekDayInfos:
+          type: array
+          items:
+            $ref: '#/components/schemas/TaskRepeatWeekDayInfo'
+          maxLength: 7
+          minLength: 1
+        
\ No newline at end of file