diff --git a/Rules b/Rules
index 72bda818..211bc92d 100644
--- a/Rules
+++ b/Rules
@@ -4,6 +4,7 @@ preprocess do
   expand_event_list("/_data/chaosevents/")
   expand_event_list("/_data/stammtisch/", "CCCS Stammtisch")
   calculate_to_dates
+  fix_timezones
   merge_location_data
   generate_event_pages
   generate_activity_pages
diff --git a/lib/eventhelpers.rb b/lib/eventhelpers.rb
index 38af752a..7fa1fa2c 100644
--- a/lib/eventhelpers.rb
+++ b/lib/eventhelpers.rb
@@ -41,3 +41,16 @@ def calculate_to_dates()
   end
 end
 
+def fix_timezones()
+  items.each do |e|
+    if e[:created_at] && e[:created_at].instance_of?(Time)
+      e[:created_at] = e[:created_at].utc
+    end
+    if e[:startdate] && e[:startdate].instance_of?(Time)
+      e[:startdate] = e[:startdate].utc
+    end
+    if e[:enddate] && e[:enddate].instance_of?(Time)
+      e[:enddate] = e[:enddate].utc
+    end
+  end
+end