Feed freshness
Your calendar feed is ready the moment you create a subscription, so your calendar app has something to show from its very first check.
After that, the feed keeps itself up to date:
Whenever someone creates, edits, moves or deletes an event, the change usually reaches your subscribed calendar app within 5 to 15 minutes.
The refresh happens in the background, so saving an event is never slowed down.
If you make several changes in quick succession, they are gathered up and usually land together in a single refresh.
If it has been more than 15 minutes and a change still has not appeared on your phone or desktop, refresh the calendar in your calendar app.
#Related
How it actually behaves.
