I have an iPhone X running iOS 14.4.1 whenever I create or modify a calendar event it takes minutes for the phone to process it. I can make an event in the same calendar on my iPad or Mac in seconds so I know it’s not an issue with the actual calendar. This issue had existed for a while
iPhone X
Hi Jmcdougs,
Welcome to Apple Support Communities. We understand you're concerned about a delayed response from your Calendar app when modifying events.
Does the same delay occur when creating a new event? Are these events originally created on your other Apple device? Is this an iCloud calendar or another third-party account calendar?
We'd recommend force quitting the Calendar app, then restarting your iPhone and test modifying an event again.
Close an app on your iPhone or iPod touch
Best regards.
Calendar slow to modify events
