You can add to your calendar Filters to temporarily hiding issues on the calendar:
Name of a filter.
- Combine filters in a group.
Join filters by OR: by default the filters are joined by operator AND, but you can join them by OR by checking this option in Quick filters menu.
You can highlight certain issues on the calendar by following actions:
- Calendar settings.
- Open card colours tab.
- Enter JQL-filter.
- Add and Save.