> Anything outside work hours doesn't need to be on a calendar.

Can't edit original, but what I meant there is that it doesn't need to be on a calendar that work has access to (if the event is outside working hours).

For things on weekends I put those on my personal calendar. But that's clear-cut separation since no work event will ever be there.

The conflict is only for personal events during work hours. For those I put the blank placeholder in work calendar to block out the time.