diff --git a/core/utils.py b/core/utils.py
index 8b0639c..08abc57 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -1,3 +1,4 @@
+from datetime import timedelta
 from icalendar import Calendar, Event, vText
 from django.template.defaultfilters import striptags
 from django.utils import timezone
@@ -16,7 +17,7 @@ def generate_events_ics(queryset):
         event.add('dtstart', e.start_date)
         event.add('uid', f'{e.slug}@feo.gmbh')
         if e.end_date:
-            event.add('dtend', e.end_date)
+            event.add('dtend', e.end_date + timedelta(days=1))
 
         if e.location_name:
             event.add('location', vText(f'{e.location_name}, {e.location_street}, {e.location_city}'))
diff --git a/requirements.in b/requirements.in
index a77ce5f..6135930 100644
--- a/requirements.in
+++ b/requirements.in
@@ -11,3 +11,4 @@ django-braces
 daphne
 celery
 redis
+ipython
diff --git a/requirements.txt b/requirements.txt
index d23d06b..5b710c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,6 +12,8 @@ asgiref==3.8.1
     # via
     #   daphne
     #   django
+asttokens==3.0.0
+    # via stack-data
 attrs==25.3.0
     # via
     #   service-identity
@@ -55,6 +57,8 @@ cryptography==44.0.2
     #   service-identity
 daphne==4.1.2
     # via -r requirements.in
+decorator==5.2.1
+    # via ipython
 defusedxml==0.7.1
     # via willow
 django==5.2
@@ -106,6 +110,8 @@ draftjs-exporter==5.1.0
     # via wagtail
 et-xmlfile==2.0.0
     # via openpyxl
+executing==2.2.0
+    # via stack-data
 filetype==1.2.0
     # via willow
 hyperlink==21.0.0
@@ -121,12 +127,24 @@ idna==3.10
     #   twisted
 incremental==24.7.2
     # via twisted
+ipython==9.2.0
+    # via -r requirements.in
+ipython-pygments-lexers==1.1.1
+    # via ipython
+jedi==0.19.2
+    # via ipython
 kombu==5.5.3
     # via celery
 laces==0.1.2
     # via wagtail
+matplotlib-inline==0.1.7
+    # via ipython
 openpyxl==3.1.5
     # via wagtail
+parso==0.8.4
+    # via jedi
+pexpect==4.9.0
+    # via ipython
 pillow==11.2.1
     # via
     #   pillow-heif
@@ -134,11 +152,17 @@ pillow==11.2.1
 pillow-heif==0.21.0
     # via willow
 prompt-toolkit==3.0.51
-    # via click-repl
+    # via
+    #   click-repl
+    #   ipython
 psycopg[binary]==3.2.6
     # via -r requirements.in
 psycopg-binary==3.2.6
     # via psycopg
+ptyprocess==0.7.0
+    # via pexpect
+pure-eval==0.2.3
+    # via stack-data
 pyasn1==0.6.1
     # via
     #   pyasn1-modules
@@ -147,6 +171,10 @@ pyasn1-modules==0.4.2
     # via service-identity
 pycparser==2.22
     # via cffi
+pygments==2.19.1
+    # via
+    #   ipython
+    #   ipython-pygments-lexers
 pyopenssl==25.0.0
     # via twisted
 python-dateutil==2.9.0.post0
@@ -165,8 +193,14 @@ soupsieve==2.7
     # via beautifulsoup4
 sqlparse==0.5.3
     # via django
+stack-data==0.6.3
+    # via ipython
 telepath==0.3.1
     # via wagtail
+traitlets==5.14.3
+    # via
+    #   ipython
+    #   matplotlib-inline
 twisted[tls]==24.11.0
     # via daphne
 txaio==23.1.1