Increased error rates for some Google calendar sync operations

Update timeline

1. investigating Mar 13, 2026, 01:29 PM UTC

   We've seen that Google's API is returning an increased number of 503 errors when we attempt to sync calendars. This is affecting a small percentage of calendars, and some users may see delayed calendar syncs as a result. We're continuing to monitor and investigate.

2. investigating Mar 13, 2026, 01:54 PM UTC

   We are seeing signs of improvement from Google's side -- error rates have improved a great deal but are not yet quite back to normal levels. We continue to monitor the situation.

3. monitoring Mar 13, 2026, 02:55 PM UTC

   Google have identified an issue within their infrastructure which they're tracking at https://www.google.com/appsstatus/dashboard/incidents/KamjizntSiNtRETcBL2Q From our side, we're now seeing very low enough error rates that we don't think that users will experience any noticeable negative impact. We'll keep watching Google's incident until it's fully resolved.

4. resolved Mar 13, 2026, 03:18 PM UTC

   Google has closed their incident and we've seen error rates remain low so are likewise marking this as resolved now.