Related Article: About the security content of iOS 16.7.1 and iPadOS 16.7.1

Calendar bug: External calendars no longer sync under 16.7.1?

I updated to 16.7.1 last night. Calendar app no longer syncs with any external calendar. Also does not show US Holidays, or any other events at all.


In app, Calendars tab shows exclamation mark in circle icon.


All external calendars show "Unable to update calendars." - Have tested this with Google and Yahoo calendars.


While troubleshooting, I tried to subscribe to a holiday calendar. I cannot unsubscribe from it, yet no events show up from it while subscribed and enabled. When I tap "Unsubscribe", I type "Unsubscribe" again at the "Are you sure" prompt. The Calendars tab shows that I am still subscribed to it. I swipe down to update, and I am still subscribed.


I have power cycled my device, turned on and off calendars under Mail/Accounts, turned on and off the iCloud calendar. I have changed the default calendar back and forth. When I turn off calendars under Mail/Accounts, the calendars still show up in the calendar app.


I have uninstalled the Calendar app and reinstalled it. Issue still persists.


I have checked another device running a previous version of iOS. Calendar functionality still works as normal

on that device.


Posted on Oct 24, 2023 1:33 PM

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Calendar bug: External calendars no longer sync under 16.7.1?

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