diff --git a/divent/bot.py b/divent/bot.py
index 2482239..1b2e6ed 100644
--- a/divent/bot.py
+++ b/divent/bot.py
@@ -140,7 +140,7 @@ async def ical(guild_id: str):
         )
 
         alarm = DisplayAlarm()
-        alarm.trigger = timedelta(hours=1)
+        alarm.trigger = timedelta(hours=-1)
         event.alarms.append(alarm)
 
         calendar.events.append(event)