To move a standard event typ between several calendars works fine.

But the attempt to move a JIRA event type (in this case a "JIRA Issue Dates") from one to another calendar has no effect. The setting (changed calendar name) will not be saved.

See attached screenshot: It shows the edit mask of an JIRA event type. When selecting a different calendar in the top most calendar selection drop box will not be stored. The JIRA event type remains in the former calendar when clicking the OK button.