event "id" includes begin time

bot.py

@@ -8,7 +8,7 @@ from asyncio import sleep
 
 import aiohttp
 import arrow
-from ics import Calendar
+from ics import Calendar, Event
 
 from config import Config
 
@@ -74,6 +74,10 @@ async def send_message(text):
         logging.debug(f"RECV: [{result.status}] {await result.text()}")
 
 
+def get_event_id(event: Event) -> str:
+    return f"{event.begin}//{event.name}"
+
+
 async def main():
     try:
         with open(STATE_PATH, 'rb') as state_fp:
@@ -93,15 +97,15 @@ async def main():
         logging.debug(f"Got {len(future_events)} future events...")
 
         for event in future_events:
-            if event.name not in state.notified and event.begin.shift(days=-2) < arrow.now():
+            if get_event_id(event) not in state.notified and event.begin.shift(days=-2) < arrow.now():
                 logging.info(f"Sending description of {event.name}")
                 await send_message(process_event(event, config.EVENT_TEMPLATE))
-                state.notified.append(event.name)
+                state.notified.append(get_event_id(event))
 
-            if event.name not in state.notified_soon and event.begin.shift(hours=-2) < arrow.now():
+            if get_event_id(event) not in state.notified_soon and event.begin.shift(hours=-2) < arrow.now():
                 logging.info(f"Notifying of {event.name}")
                 await send_message(process_event(event, config.SOON_TEMPLATE))
-                state.notified_soon.append(event.name)
+                state.notified_soon.append(get_event_id(event))
 
         with open(STATE_PATH, 'wb') as state_fp:
             pickle.dump(state, state_fp)