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Calendar not syncing, or events not showing up on a second device? This page helps you find the cause and fix it step by step. On this page 1 · How syn...

Having trouble with Google Calendar synchronization? If events show up in the Google app but are missing in aCalendar, it is usually due to Android settin...

Using Hotmail, Outlook.com, Office 365, Microsoft 365 or a corporate Exchange account? Here is how to get your calendar into aCalendar. On this page 1 ...

Want to use calendars from ownCloud, Synology, Yahoo, web.de, GMX, Posteo or any other CalDAV service in aCalendar? Here is how to set it up. On this p...

Want to share a calendar with family, friends, or coworkers? Since aCalendar is not a cloud service and does not host your data on its own servers, calend...

Want to sync your Apple iCloud calendars, contacts, or reminders with your Android device? Since Android doesn't natively support iCloud synchronizati...

Want to see your Facebook friends' birthdays and upcoming events inside aCalendar? Because Facebook stopped offering direct calendar synchronization f...