To choose the view select Calendar Tab then click on Edit button and put ticks on needed views:
You can use several types of calendars in server versions:
- Custom Calendar Tab (select "Calendar" from the main menu JIRA)
- Project Calendar Tab (select "Projects \ Project Name \ Add-ons\Calendar" in the main menu JIRA)
- Issue Calendar Tab (select "Calendar" in the section of issue - "Activities")
For cloud version by now it is available only from JIRA main menu.