diff --git a/bundles/infobeamer-cms/metadata.py b/bundles/infobeamer-cms/metadata.py
index f340e01..4413d5a 100644
--- a/bundles/infobeamer-cms/metadata.py
+++ b/bundles/infobeamer-cms/metadata.py
@@ -1,4 +1,4 @@
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 
 assert node.has_bundle('redis')
 
@@ -52,7 +52,7 @@ def nginx(metadata):
     'infobeamer-cms/config/TIME_MIN',
 )
 def event_times(metadata):
-    event_start = datetime.strptime(metadata.get('infobeamer-cms/event_start_date'), '%Y-%m-%d')
+    event_start = datetime.strptime(metadata.get('infobeamer-cms/event_start_date'), '%Y-%m-%d').replace(tzinfo=timezone.utc)
     event_duration = metadata.get('infobeamer-cms/event_duration_days', 4)
 
     event_end = event_start + timedelta(days=event_duration)