According to 9to5Google, this is a “relatively widespread bug” that has appeared in the last day or so. Users have reported seeing various types of emails, such as delivery notifications, purchase receipts, and newsletters, appear as all-day calendar events. It is not clear why this issue occurs, but some speculate that emails with dates mentioned may be the cause.
— Justin Duino (@jaduino) December 23, 2022
How to fix the Google Calendar Bug?
Google has not yet released a permanent solution to this bug, but there is a temporary solution available. To fix the bug and get your calendar back on track, you can disable the “Events from Gmail” feature in Google Calendar. This will stop Google Calendar from creating events based on the content of your incoming emails, which should resolve the issue of random, nonexistent all-day events appearing in your calendar. To disable the “Events from Gmail” feature in Google Calendar, you can start by opening Google Calendar in your web browser. Once you have Google Calendar open, look for the gear icon in the top right corner of the screen. Click on the gear icon to access the Settings menu. In the Settings menu, click on the “Events from Gmail” tab. From here, you can toggle off the “Show events from Gmail” option.