This article will show you how to delete multiple events at one time.
Instructions
Sign in to your solution if you have not already
Navigate to the Events module:

Click the List View tab:

Navigate to the Show menu and select the timeframe of events you wish to view:

All Upcoming Events: View all future events
Events For Next 30 Days: View all events taking place within the next 30 days
Events For Last 30 Days: View all events that have taken place within the last 30 days
All Events: View all past and future events
Events for Custom Date Range: View all events within a specific timeframe (enter your preferred dates into the "from" and "to" fields that appear)
Click the Filters button to narrow down further the events displayed:

Click the Filter dropdown options and set the desired parameters to filter the events in your module:

Template: Filter by event template (for example, a one-time or recurring event)
Category: Filter by event category (for example, city council or leadership committee)
Published: Filter to see published, unpublished, or all events
Created by: Filter by who created the event
Click the Load All button to apply the selected filters and load the results:

Click the checkbox to the left of the Name column to select all displayed events automatically:

Or click the checkboxes to the left of the individual events you wish to delete:

Click the Delete Selected Events button:

Click the "X" icon to the right of a specific event to remove it from the Events to Delete list, if desired:

Click the Delete Events button to confirm the deletion of all selected events:

The selected events have been deleted
Note:
You can restore deleted events with the Trash Can feature.