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Cronofy Outage History

Every past Cronofy outage tracked by IsDown, with detection times, duration, and resolution details.

There were 101 Cronofy outages since February 2017. The 20 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor March 13, 2026

March 2026: Increased error rates for some Google calendar sync operations

Detected Mar 13, 2026 9:29 AM EDT · Resolved Mar 13, 2026 11:19 AM EDT · Duration about 2 hours

Google's API returned increased 503 errors, causing delayed calendar syncs for a small percentage of Cronofy users over 1.8 hours. Google identified and resolved an infrastructure issue on their end, with Cronofy confirming error rates returned to normal levels and marking the incident resolved.

Major February 27, 2026

February 2026: Events failing to sync to user calendars

Detected Feb 27, 2026 11:06 AM EST · Resolved Feb 27, 2026 12:36 PM EST · Duration about 2 hours

A code change deployed at 12:30 UTC prevented calendar events with integrated conferencing from syncing to Microsoft calendars, affecting Cronofy's background processing systems. The issue was identified and fixed by 16:05 UTC, with over 90% of impacted events automatically recovered through retry mechanisms by 17:00 UTC. All remaining affected events were proactively retried and successfully synced by 17:30 UTC, fully resolving the 5-hour incident.