diff --git a/docker/radicale_config/config b/docker/radicale_config/config
index c8934b2b5..3d513f2b6 100644
--- a/docker/radicale_config/config
+++ b/docker/radicale_config/config
@@ -153,6 +153,8 @@ type = none
 
 level = debug
 
+request_content_on_debug = true
+
 [headers]
 
 # Additional HTTP headers
diff --git a/frontend/package.json b/frontend/package.json
index 5f8274f7c..c1193ff4a 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -15,11 +15,6 @@
     "gettext:compile": "vue-gettext-compile"
   },
   "dependencies": {
-    "@fullcalendar/core": "^6.1.15",
-    "@fullcalendar/daygrid": "^6.1.15",
-    "@fullcalendar/interaction": "^6.1.15",
-    "@fullcalendar/timegrid": "^6.1.15",
-    "@fullcalendar/vue3": "^6.1.15",
     "@mdi/font": "^7.3.67",
     "@tiptap/extension-highlight": "^3.11.0",
     "@tiptap/extension-text-align": "^3.11.0",
diff --git a/frontend/src/views/calendars/CalendarView.vue b/frontend/src/views/calendars/CalendarView.vue
index 9d1ea2bb1..d9b6d44c7 100644
--- a/frontend/src/views/calendars/CalendarView.vue
+++ b/frontend/src/views/calendars/CalendarView.vue
@@ -68,11 +68,13 @@
         :event-ripple="false"
         @mousedown:event="startDrag"
         @mousedown:time="startTime"
-        @click:event="eventClickCallback"
+        @mousedown:day="startDay"
         @click:day="dayClickCallback"
         @mouseleave="cancelDrag"
         @mousemove:time="mouseMove"
+        @mousemove:day="mouseMoveDay"
         @mouseup:time="endDrag"
+        @mouseup:day="endDragDay"
         @change="fetchUserEvents"
       >
         <template #event="{ event, timed, eventSummary }">
@@ -159,6 +161,7 @@ const ctype = ref('week')
 const focus = ref('')
 const dragEvent = ref(null)
 const dragTime = ref(null)
+const dragDay = ref(null)
 const createEvent = ref(null)
 const createStart = ref(null)
 const extendOriginal = ref(null)
@@ -295,21 +298,14 @@ async function fetchUserCalendars() {
   userCalendars.value = resp.data
 }
 
-function refreshCalendarEvents(calendarPk) {
+function refreshCalendarEvents() {
   fetchUserEvents({
     start: calendarRef.value.renderProps.start,
     end: calendarRef.value.renderProps.end,
   })
 }
 
-async function eventClickCallback(nativeEvent, { event }) {
-  if (!updating.value && !moving.value) {
-    selectedEvent.value = event
-    showEventForm.value = true
-  }
-}
-
-const dayClickCallback = (nativeEvent, { date, time }) => {
+const dayClickCallback = (nativeEvent, { date }) => {
   if (!selectedEvent.value) {
     const startDate = new Date(date)
     const endDate = new Date(date)
@@ -331,10 +327,8 @@ async function updateEventDates(calEvent) {
   }
   const evtCalendar = calEvent.calendar
   if (!calEvent.timed) {
-    const end = DateTime.fromJSDate(data.start)
-    end.plus({ days: 1 })
-    data.start.setHours(0, 0, 0)
-    data.end = end
+    data.start_date = data.start.toISOString().split('T')[0]
+    data.end_date = data.end.toISOString().split('T')[0]
     data.allDay = calEvent.allDay
   } else if (!calEvent.end) {
     const end = DateTime.fromJSDate(data.start)
@@ -348,12 +342,6 @@ async function updateEventDates(calEvent) {
     updating.value = false
   }
 }
-function eventDropCallback(info) {
-  updateEventDates(info.event)
-}
-function eventResizeCallback(info) {
-  updateEventDates(info.event)
-}
 
 const roundTime = (time, down = true) => {
   const roundTo = 15 // minutes
@@ -387,16 +375,18 @@ const getEventColor = (event) => {
 }
 
 const startDrag = (nativeEvent, { event, timed }) => {
-  console.log('startDrag')
-  if (event && timed) {
+  if (event) {
     dragEvent.value = event
-    dragTime.value = null
-    extendOriginal.value = null
+    if (timed) {
+      dragTime.value = null
+      extendOriginal.value = null
+    } else {
+      dragDay.value = null
+    }
   }
 }
 
 const startTime = (nativeEvent, tms) => {
-  console.log('startTime')
   const mouse = toTime(tms)
 
   if (dragEvent.value && dragTime.value === null) {
@@ -417,6 +407,14 @@ const startTime = (nativeEvent, tms) => {
   }
 }
 
+const startDay = (nativeEvent, tms) => {
+  const mouse = toTime(tms)
+
+  if (dragEvent.value && dragDay.value === null) {
+    dragDay.value = mouse - dragEvent.value.start
+  }
+}
+
 const mouseMove = (nativeEvent, tms) => {
   const mouse = toTime(tms)
 
@@ -442,14 +440,29 @@ const mouseMove = (nativeEvent, tms) => {
   }
 }
 
+const mouseMoveDay = (nativeEvent, tms) => {
+  const mouse = toTime(tms)
+  if (dragEvent.value && dragDay.value !== null) {
+    moving.value = true
+    const start = dragEvent.value.start
+    const end = dragEvent.value.end
+    const duration = end - start
+    const newStartTime = mouse - dragDay.value
+    const newStart = roundTime(newStartTime)
+    const newEnd = newStart + duration
+
+    dragEvent.value.start = newStart
+    dragEvent.value.end = newEnd
+  }
+}
+
 const extendBottom = (event) => {
   createEvent.value = event
   createStart.value = event.start
   extendOriginal.value = event.end
 }
 
-const endDrag = (nativeEvent, params) => {
-  console.log('endDrag')
+const endDrag = () => {
   if (createEvent.value && !extendOriginal.value) {
     selectInfo.value = createEvent.value
     showEventForm.value = true
@@ -460,6 +473,9 @@ const endDrag = (nativeEvent, params) => {
       } else if (createEvent.value) {
         updateEventDates(createEvent.value)
       }
+    } else {
+      selectedEvent.value = dragEvent.value
+      showEventForm.value = true
     }
 
     dragTime.value = null
@@ -471,8 +487,21 @@ const endDrag = (nativeEvent, params) => {
   }
 }
 
+const endDragDay = () => {
+  if (dragEvent.value) {
+    if (moving.value) {
+      updateEventDates(dragEvent.value)
+    } else {
+      selectedEvent.value = dragEvent.value
+      showEventForm.value = true
+    }
+  }
+  dragEvent.value = null
+  dragDay.value = null
+  moving.value = false
+}
+
 const cancelDrag = () => {
-  console.log('cancelDrag')
   if (createEvent.value) {
     if (extendOriginal.value) {
       createEvent.value.end = extendOriginal.value
@@ -511,41 +540,12 @@ async function deleteCalendar(calendarPk) {
     return
   }
   await api.deleteUserCalendar(calendarPk)
-  const fullc = calendarRef.value.getApi()
-  const evtSource = fullc.getEventSourceById(`user-${calendarPk}`)
-  evtSource.remove()
   await fetchUserCalendars()
+  events.value = []
+  calendarRef.value.checkChange()
   busStore.displayNotification({ msg: $gettext('Calendar deleted') })
 }
 
-/* const calendarOptions = {
- *   plugins: [timeGridPlugin, dayGridPlugin, interactionPlugin],
- *   headerToolbar: {
- *     left: 'prev,next today',
- *     center: 'title',
- *     right: 'dayGridMonth,timeGridWeek,timeGridDay',
- *   },
- *   scrollTime: '09:00:00',
- *   height: '100%',
- *   firstDay: 1,
- *   initialView: 'timeGridWeek',
- *   locale: current,
- *   selectable: true,
- *   selectMirror: true,
- *   editable: true,
- *   dayMaxEventRows: true,
- *   businessHours: {
- *     daysOfWeek: [1, 2, 3, 4, 5],
- *     startTime: '09:00',
- *     endTime: '18:00',
- *     },
- *     select: selectCallback,
- *     eventClick: eventClickCallback,
- *     eventDrop: eventDropCallback,
- *     eventResize: eventResizeCallback,
- *   }
- *  */
-
 watch(
   leftMenuItems,
   (value) => {
@@ -554,24 +554,6 @@ watch(
   { immediate: true }
 )
 
-/* watch(userCalendars, (value) => {
- *   const fullc = calendarRef.value.getApi()
- *   if (!fullc) {
- *     return
- *   }
- *   for (const calendar of value) {
- *     fetchUserCalendars(
- *     const evtSource = fullc.getEventSourceById(`user-${calendar.pk}`)
- *     if (!evtSource) {
- *       fullc.addEventSource({
- *         id: `user-${calendar.pk}`,
- *         events: fetchUserCalendarEvents.bind(this, calendar.pk),
- *       })
- *     }
- *   }
- * })
- *  */
-
 onMounted(() => {
   calendarRef.value.scrollToTime('07:00')
   calendarRef.value.checkChange()
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index 1b09454a2..39477aa68 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -245,35 +245,6 @@
   resolved "https://registry.yarnpkg.com/@floating-ui/utils/-/utils-0.2.10.tgz#a2a1e3812d14525f725d011a73eceb41fef5bc1c"
   integrity sha512-aGTxbpbg8/b5JfU1HXSrbH3wXZuLPJcNEcZQFMxLs3oSzgtVu6nFPkbbGGUvBcUjKV2YyB9Wxxabo+HEH9tcRQ==
 
-"@fullcalendar/core@^6.1.15":
-  version "6.1.19"
-  resolved "https://registry.yarnpkg.com/@fullcalendar/core/-/core-6.1.19.tgz#60379111ba0cfb9fd9bc6594fee47cf855fc77b2"
-  integrity sha512-z0aVlO5e4Wah6p6mouM0UEqtRf1MZZPt4mwzEyU6kusaNL+dlWQgAasF2cK23hwT4cmxkEmr4inULXgpyeExdQ==
-  dependencies:
-    preact "~10.12.1"
-
-"@fullcalendar/daygrid@^6.1.15", "@fullcalendar/daygrid@~6.1.19":
-  version "6.1.19"
-  resolved "https://registry.yarnpkg.com/@fullcalendar/daygrid/-/daygrid-6.1.19.tgz#1d70a7f3f4cc13d3f27f55ed6880aae09a1a367b"
-  integrity sha512-IAAfnMICnVWPjpT4zi87i3FEw0xxSza0avqY/HedKEz+l5MTBYvCDPOWDATpzXoLut3aACsjktIyw9thvIcRYQ==
-
-"@fullcalendar/interaction@^6.1.15":
-  version "6.1.19"
-  resolved "https://registry.yarnpkg.com/@fullcalendar/interaction/-/interaction-6.1.19.tgz#48d85601a4203ede7cb400323fe5a9c163e28804"
-  integrity sha512-GOciy79xe8JMVp+1evAU3ytdwN/7tv35t5i1vFkifiuWcQMLC/JnLg/RA2s4sYmQwoYhTw/p4GLcP0gO5B3X5w==
-
-"@fullcalendar/timegrid@^6.1.15":
-  version "6.1.19"
-  resolved "https://registry.yarnpkg.com/@fullcalendar/timegrid/-/timegrid-6.1.19.tgz#bb4b2e3039c995b61284ee5b76ad9dcc696b71ce"
-  integrity sha512-OuzpUueyO9wB5OZ8rs7TWIoqvu4v3yEqdDxZ2VcsMldCpYJRiOe7yHWKr4ap5Tb0fs7Rjbserc/b6Nt7ol6BRg==
-  dependencies:
-    "@fullcalendar/daygrid" "~6.1.19"
-
-"@fullcalendar/vue3@^6.1.15":
-  version "6.1.19"
-  resolved "https://registry.yarnpkg.com/@fullcalendar/vue3/-/vue3-6.1.19.tgz#43cecccfaca27679823b98c73ba2e042c60e98cb"
-  integrity sha512-j5eUSxx0xIy3ADljo0f5B9PhjqXnCQ+7nUMPfsslc2eGVjp4F74YvY3dyd6OBbg13IvpsjowkjncGipYMQWmTA==
-
 "@humanfs/core@^0.19.1":
   version "0.19.1"
   resolved "https://registry.yarnpkg.com/@humanfs/core/-/core-0.19.1.tgz#17c55ca7d426733fe3c561906b8173c336b40a77"
@@ -1936,11 +1907,6 @@ postcss@^8.5.3, postcss@^8.5.6:
     picocolors "^1.1.1"
     source-map-js "^1.2.1"
 
-preact@~10.12.1:
-  version "10.12.1"
-  resolved "https://registry.yarnpkg.com/preact/-/preact-10.12.1.tgz#8f9cb5442f560e532729b7d23d42fd1161354a21"
-  integrity sha512-l8386ixSsBdbreOAkqtrwqHwdvR35ID8c3rKPa8lCWuO86dBi32QWHV4vfsZK1utLLFMvw+Z5Ad4XLkZzchscg==
-
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
diff --git a/modoboa/calendars/backends/caldav_.py b/modoboa/calendars/backends/caldav_.py
index 4526cc3e7..34f06f31b 100644
--- a/modoboa/calendars/backends/caldav_.py
+++ b/modoboa/calendars/backends/caldav_.py
@@ -6,6 +6,7 @@ import uuid
 import caldav
 from caldav.elements import dav, ical
 from caldav import Calendar
+from dateutil.relativedelta import relativedelta
 import vobject
 
 from django.utils import timezone
@@ -53,8 +54,10 @@ class Caldav_Backend(CalendarBackend):
             start = datetime.datetime.combine(
                 vevent.dtstart.value, datetime.time.min
             ).replace(tzinfo=tz)
+            # Small back to make vuetify calendar happy. 'All day' events are generally
+            # created from one day to the day after (even for a 1 day duration...)
             end = datetime.datetime.combine(
-                vevent.dtend.value, datetime.time.min
+                vevent.dtend.value - relativedelta(days=1), datetime.time.min
             ).replace(tzinfo=tz)
         result.update({"allDay": all_day, "start": start, "end": end})
         if "attendee" in vevent.contents:
@@ -85,7 +88,8 @@ class Caldav_Backend(CalendarBackend):
             dtend = data["end"]
         else:
             dtstart = data["start_date"]
-            dtend = data["end_date"]
+            # Ensure consistent behavior with other calendar clients (like TB.)
+            dtend = data["end_date"] + relativedelta(days=1)
         self.remote_cal.save_event(
             uid=uid, dtstart=dtstart, dtend=dtend, summary=data["title"]
         )
@@ -139,7 +143,9 @@ class Caldav_Backend(CalendarBackend):
 
     def get_events(self, start, end):
         """Retrieve a list of events."""
-        orig_events = self.remote_cal.search(server_expand=True, start=start, end=end)
+        orig_events = self.remote_cal.search(
+            server_expand=False, start=start, end=end, event=True
+        )
         events = []
         for event in orig_events:
             events.append(self._serialize_event(event))