diff --git a/NEWS b/NEWS
index d63c2411e..0c560ea72 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,7 @@
 
 Enhancements
  - [core] added handling of BYSETPOS for BYDAY in recurrence rules
+ - [web] added sort by start date for tasks (#3840)
 
 Bug fixes
  - [web] fixed JavaScript exception when SOGo is launched from an external link (#3900)
diff --git a/UI/Scheduler/NSArray+Scheduler.h b/UI/Scheduler/NSArray+Scheduler.h
index 10048f0ef..cf1b83e8e 100644
--- a/UI/Scheduler/NSArray+Scheduler.h
+++ b/UI/Scheduler/NSArray+Scheduler.h
@@ -54,21 +54,22 @@
 #define taskCalendarNameIndex       2
 #define taskStatusIndex             3
 #define taskTitleIndex              4
-#define taskEndDateIndex            5
-#define taskClassificationIndex     6
-#define taskLocationIndex           7
-#define taskCategoryIndex           8
-#define taskViewableIndex           9
-#define taskEditableIndex          10
-#define taskErasableIndex          11
-#define taskPriorityIndex          12
-#define taskOwnerIndex             13
-#define taskIsCycleIndex           14
-#define taskNextAlarmIndex         15
-#define taskRecurrenceIdIndex      16
-#define taskIsExceptionIndex       17
-#define taskDescriptionIndex       18
-#define taskStatusFlagIndex        19
+#define taskStartDateIndex          5
+#define taskEndDateIndex            6
+#define taskClassificationIndex     7
+#define taskLocationIndex           8
+#define taskCategoryIndex           9
+#define taskViewableIndex          10
+#define taskEditableIndex          11
+#define taskErasableIndex          12
+#define taskPriorityIndex          13
+#define taskOwnerIndex             14
+#define taskIsCycleIndex           15
+#define taskNextAlarmIndex         16
+#define taskRecurrenceIdIndex      17
+#define taskIsExceptionIndex       18
+#define taskDescriptionIndex       19
+#define taskStatusFlagIndex        20
 
 @interface NSArray (SOGoEventComparison)
 
@@ -80,7 +81,8 @@
 - (NSComparisonResult) compareTasksAscending: (NSArray *) otherTask;
 - (NSComparisonResult) compareTasksPriorityAscending: (NSArray *) otherTask;
 - (NSComparisonResult) compareTasksTitleAscending: (NSArray *) otherTask;
-- (NSComparisonResult) compareTasksEndAscending: (NSArray *) otherTask;
+- (NSComparisonResult) compareTasksStartDateAscending: (NSArray *) otherTask;
+- (NSComparisonResult) compareTasksEndDateAscending: (NSArray *) otherTask;
 - (NSComparisonResult) compareTasksLocationAscending: (NSArray *) otherTask;
 - (NSComparisonResult) compareTasksCategoryAscending: (NSArray *) otherTask;
 - (NSComparisonResult) compareTasksCalendarNameAscending: (NSArray *) otherTask;
diff --git a/UI/Scheduler/NSArray+Scheduler.m b/UI/Scheduler/NSArray+Scheduler.m
index f4fc06017..0309e0226 100644
--- a/UI/Scheduler/NSArray+Scheduler.m
+++ b/UI/Scheduler/NSArray+Scheduler.m
@@ -182,7 +182,41 @@
   return [selfTitle caseInsensitiveCompare: otherTitle];
 }
 
-- (NSComparisonResult) compareTasksEndAscending: (NSArray *) otherTask
+- (NSComparisonResult) compareTasksStartDateAscending: (NSArray *) otherTask
+{
+  NSComparisonResult result;
+  unsigned int selfTime, otherTime;
+
+  // Start date
+  selfTime = [[self objectAtIndex: taskStartDateIndex] intValue];
+  otherTime = [[otherTask objectAtIndex: taskStartDateIndex] intValue];
+  if (selfTime && !otherTime)
+    result = NSOrderedAscending;
+  else if (!selfTime && otherTime)
+    result = NSOrderedDescending;
+  else
+  {
+    if (selfTime > otherTime)
+      result = NSOrderedDescending;
+    else if (selfTime < otherTime)
+      result = NSOrderedAscending;
+    else
+    {
+      // Calendar ID
+      result = [[self objectAtIndex: taskFolderIndex]
+                  compare: [otherTask objectAtIndex: taskFolderIndex]];
+      if (result == NSOrderedSame)
+        // Task name
+        result = [[self objectAtIndex: taskTitleIndex]
+                    compare: [otherTask objectAtIndex: taskTitleIndex]
+                    options: NSCaseInsensitiveSearch];
+    }
+  }
+
+  return result;
+}
+
+- (NSComparisonResult) compareTasksEndDateAscending: (NSArray *) otherTask
 {
   NSComparisonResult result;
   unsigned int selfTime, otherTime;
diff --git a/UI/Scheduler/UIxCalListingActions.m b/UI/Scheduler/UIxCalListingActions.m
index 2cbe8dbed..5c17f22a0 100644
--- a/UI/Scheduler/UIxCalListingActions.m
+++ b/UI/Scheduler/UIxCalListingActions.m
@@ -90,7 +90,7 @@ static NSArray *tasksFields = nil;
   {
     tasksFields = [NSArray arrayWithObjects: @"c_name", @"c_folder",
                    @"calendarName",
-                   @"c_status", @"c_title", @"c_enddate",
+                   @"c_status", @"c_title", @"c_startdate", @"c_enddate",
                    @"c_classification", @"c_location", @"c_category",
                    @"viewable", @"editable", @"erasable",
                    @"c_priority", @"c_owner",
@@ -1595,7 +1595,6 @@ _computeBlocksPosition (NSArray *blocks)
                                                       forAllDay: NO]];
       else
         [filteredTask addObject: [NSNull null]];
-      
       if (([tasksView isEqualToString:@"view_today"]  ||
            [tasksView isEqualToString:@"view_next7"]  ||
            [tasksView isEqualToString:@"view_next14"] ||
@@ -1621,8 +1620,10 @@ _computeBlocksPosition (NSArray *blocks)
     [filteredTasks sortUsingSelector: @selector (compareTasksTitleAscending:)];
   else if ([sort isEqualToString: @"priority"])
     [filteredTasks sortUsingSelector: @selector (compareTasksPriorityAscending:)];
+  else if ([sort isEqualToString: @"start"])
+    [filteredTasks sortUsingSelector: @selector (compareTasksStartDateAscending:)];
   else if ([sort isEqualToString: @"end"])
-    [filteredTasks sortUsingSelector: @selector (compareTasksEndAscending:)];
+    [filteredTasks sortUsingSelector: @selector (compareTasksEndDateAscending:)];
   else if ([sort isEqualToString: @"location"])
     [filteredTasks sortUsingSelector: @selector (compareTasksLocationAscending:)];
   else if ([sort isEqualToString: @"category"])
diff --git a/UI/Templates/SchedulerUI/UIxCalMainView.wox b/UI/Templates/SchedulerUI/UIxCalMainView.wox
index 140e7cec2..673ab9f15 100644
--- a/UI/Templates/SchedulerUI/UIxCalMainView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalMainView.wox
@@ -466,7 +466,7 @@
                         <!-- selected --></md-icon> <var:string label:value="Calendar"/>
                     </md-button>
                   </md-menu-item>
-                  <md-menu-item ng-if="list.componentType == 'events'">
+                  <md-menu-item>
                     <md-button ng-click="list.sort('start')">
                       <md-icon ng-class="{ 'icon-check': list.sortedBy('start') }">
                         <!-- selected --></md-icon> <var:string label:value="Start"/>