Dear calendar, please just sync.

Calendars Demand Consistency

In some instances, not all of your calendars will sync from Google Calendars to all of your devices. I have noticed this in particular with a subscribed calendar.

On the opposite, Google Calendar loves to sync one of its own custom Contacts calendar… you can turn that off too.

Sneaky Google Calendar Sync Settings Page

Navigate to this Google Calendar Sync Selection page where you can toggle each calendar on and off.