Several users have reported an odd glitch in the calendar app. The app seems to be creating all-day events based on the contents of users' email.

Emails such as delivery notifications, purchase receipts, and newsletters seem to be showing up as all-day calendar events according to 9to5Google. This glitch is affecting some staffers who use the calendar app. One writer said it was like finding a bomb in his calendar.

A request for comment has not been replied to.

A screenshot of the Google Calendar app in dark mode. The day of December 23rd has four all-day events titled Your Epic Games Receipt, one titled Your UPS Package Was Delivered, and one titled UPS: Get Ready For Your Package.
Make sure you’re not late for your Epic Games Receipt appointment.

If you want to stop this from happening, the simplest solution is to turn off the show events from Gmail in your calendar. If you want to keep invitations off of your calendar, this is a good way to go.