- From your Calendar, choose View > Change View > List.
- In the Arrangement group, choose Categories. This will sort all of your events by category.
- Scroll through the list of events until you see the Holidays category.
- Select one or more holidays. Holidays are sorted by location, which arranges all holidays by country. Once you’ve selected the holidays you want to delete, choose Home > Delete.
- To return to your normal Calendar view, choose View > Change View > Calendar