The created appointments and events can be deleted from our Xiaomi smartphone if we no longer need them or if the calendar app has become too confusing.

Note: Deleted events cannot be recovered.

Android 10 (MIUI 12.0)
Step 1:  Open the  Calendar app
Step 2:  Choose an  event
Step 3:  Tap on  Delete
Step 4:  Choose  This and future events  or  All events
Step 5:  Tap on  OK
  1. Open the Calendar app
  2. Choose an event
  3. Tap on Delete
  4. Choose This and future events or All events
  5. Tap on OK

Xiaomi Instructions