Provider
ProtonIncident detail
Proton Calendar Issue
Timeline window
to
Outage alerts
Get alerted the next time Proton breaks
Free email alerts for up to 5 providers — no card, live in about a minute. Paid plans add Slack, Discord, and webhook delivery across your whole stack, plus higher API quotas.
Timeline
Incident updates
Updates are normalized from the official source chronology so timeline changes remain easy to scan.
Resolved
We experienced an infrastructure issue on our API that caused some users to experience an empty Calendar app on Android, with no events or calendars displayed. No data was lost, and all events and calendars remained safe. The underlying issue was resolved at 2026-06-30 19:38 UTC.
If you have been affected and are still not seeing your data within the app, here are quick steps to resolve the issue:
Tap the hamburger menu on the left side → Click Refresh
If that was not sufficient, you can log out and log back in.
Should you require further assistance in the matter, please contact support.