I understand from other questions that the first Calendar listed is your default calendar.
I have 8 calendars (not all visible). I want Calendar in the fourth position to become my Default, but I don't want to lose the info in my other calendars (including the current default).
Other responses seemed to solve changing default to a new calendar. I imagine switching defaults still involves some exporting, unsubscribing and importing, but I'd appreciate the exact 'script.'