One additional note: On/in my android app, here are the steps:
- Tap the pencil in the upper right corner
- Tap the check-box to the left of each event you want to delete (or tap “Select All” top right)
- Tap “Delete” bottom right
- Tap “Cancel” to cancel the delete operation
It’s not completely intuitive (especially starting with the pencil icon) but it works once you know about it.