If your calendar suddenly looks empty and all your appointments are gone, do not panic. aCalendar itself does not save or delete your events; it only displays them from your Android system database. Here is how to find and restore your data.

1

Check Calendar Visibility & Local Data

Most of the time, the events are still on your phone but have simply been hidden from view. Check these settings first:

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The Calendar List

Open the main side menu and tap on Manage Calendars. Make sure your calendars are checked and active. If a calendar is turned off here, its events will not show up anywhere.

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Active Profiles

Look at the top header of your calendar view. If you are using a specific Profile (like Work or Private), you might be filtering out your other events. Try switching back to the ALL profile to see everything.

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Local Offline Calendars

If your missing data was stored in a Local Calendar (phone-only, not linked to Google, Outlook, or any cloud account), it does not have an automatic online copy. If the database crashes, you may need to restore these events from a backup app or manual file export if you created one earlier.

2

Verify Cloud Sync & Android Accounts

If you use a cloud calendar (like Google, Outlook, or Exchange) and your account settings changed, the data might stop syncing:

Check Account Login Status

Go to your phone's system Settings → Passwords & Accounts (or Accounts). Make sure your cloud account is listed and that there are no "action required" login or security warnings.

Force an Account Sync

Inside your phone's account settings, tap your account (e.g., your Google account) and select Account Sync. Turn the Calendar toggle switch off, wait a few seconds, and turn it back on to trigger a fresh download from the cloud servers.

3

Fix Android Calendar Storage Issues

Sometimes the central Android database that handles calendar entries gets corrupted or stuck, causing all events to disappear visually:

The Stock Calendar Check: Open the basic factory calendar app that came with your device (like the Google Calendar app or the Samsung Calendar app). Are your events missing there too? If yes, this proves that the issue is a system-wide Android storage glitch and not a fault inside aCalendar.

How to fix it: You can solve this by clearing and resetting the background storage app. Please note that while cloud entries are completely safe, any local offline calendars will be deleted during a reset. For detailed step-by-step instructions, please follow our separate guide on How to safely reset the Android Calendar Storage.