Why apple calendar not syncing?
Short answerWhen Apple Calendar is not syncing, Apple's support page lists these first checks: look at the iCloud system status, update iOS or macOS, confirm the same Apple Account is used on every device with Calendars turned on, and check date and time settings [1]. Then refresh the Calendars tab by swiping down [1].
The explanation
Start with the outage check, since no setting on your phone fixes a service problem [1]. If the status is fine, update the operating system and confirm the account. Mismatched accounts are the most common cause when only some events appear.
Next, in the Calendar app make sure all iCloud calendars are selected, and open the Sync setting to switch between all events and a limited timeframe, which Apple suggests as a way to force a refresh [1]. Wait a few minutes after each change.
If it still fails, restart the device and try iCloud.com in a browser. If events show there but not on the phone, the problem is local. If they do not show there, it is the account or service. Note what you tried before contacting Apple.
Steps
- Check Apple's system status page for iCloud Calendar.
- Update iOS or macOS and confirm the same Apple Account everywhere.
- Select all iCloud calendars and change the Sync timeframe setting.
- Swipe down to refresh, restart, then compare with iCloud.com.
What to watch for
- Making many changes at once so you cannot tell which fixed it.
- Wrong date or time settings on the phone, which Apple lists as a cause.
How Apex does it
Not a scheduler feature
Apex does not run on Apple Calendar. Its calendar sync and iCal feed are in progress, and an owner who uses a subscribe feed would still depend on the phone's own calendar app refreshing.
Apex Flow Scheduler is in early access. See how we label status.
Sources
- Apple Support: iCloud Calendars will not sync (read 2026-10-07)
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