Do you use SyncThemCalendars?
What is SyncThemCalendars?
SyncThemCalendars allows you to sync events between two calendars. You'll be able to block time in one calendar based on events in the other calendar.
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SyncThemCalendars
SyncThemCalendars is a service which allows you to set up multiple syncs between calendars. You can have all events on your private calendar block time on your work calendar. Or copy all events from the office shared events calendar over to your work calendar.