macOS calendar.app - app reset results in calendars reappearing How do you delete all calendars app data and reset the app information to default.

Issue:


I delete all the calendar data and reboot the system.  I open the calendar app and it has reset to the default calendars.  But then it resets again and loads the previous calendars that I deleted.  Not sure where it's finding it from since I thought I deleted all the locations the calendar app data resides.


Setup


on macOS 10.14.6
calendar Version 11.0 (2245.5.2)
local sync only (no iCloud)


I have deleted the following:


~/Library/Calendar/
~/Library/Containers/com.apple.CalendarAgent
~/Library/Containers/com.apple.CalendarAgent.CalNCService
~/Library/Containers/com.apple.CalendarFileHandler
~/Library/Containers/com.apple.CalendarNotification.CalNCService
~/Library/Containers/com.apple.iCal.CalendarNC


Then I have rebooted the system.
So after deleting the above folders and if the issue still exists enter the following terminal command

defaults delete com.apple.SyncServer SyncServicesResetWorldRunOnce


Then reboot the system.