Outage in Cronofy

Apple calendar sync degraded

Resolved Minor
September 15, 2025 - Started about 20 hours ago - Lasted about 1 hour
Official incident page

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Outage Details

Since 10:40 UTC we have observed an increased error rate for Apple calendar sync operations. We are still seeing more successes than failures but consider there to be enough failures to mark Apple as degraded. Our retry mechanisms appear to be doing their job, but changes to calendars may take longer to sync both to and from Apple as a result of the underlying errors. We are monitoring the situation.
Components affected
Cronofy Apple
Latest Updates ( sorted recent to last )
RESOLVED about 19 hours ago - at 09/15/2025 11:49AM

Starting at 10:40 UTC we observed an elevated error rate when communicating with Apple's calendar service. Errors returned to regular levels by 11:35 UTC.

Sync with Apple calendars may have taken longer both to and from Apple as a result of the underlying errors during this period.

MONITORING about 20 hours ago - at 09/15/2025 11:04AM

Since 10:40 UTC we have observed an increased error rate for Apple calendar sync operations. We are still seeing more successes than failures but consider there to be enough failures to mark Apple as degraded.

Our retry mechanisms appear to be doing their job, but changes to calendars may take longer to sync both to and from Apple as a result of the underlying errors.

We are monitoring the situation.

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