Is it possible to change which calendar opens as your default when you go into the calendar section of Outlook?

I'm a PA and I never use my personal outlook calendar, only ever my boss's which i have permissions to access. It's not a huge deal if not, but is it possible to make his calendar the one that opens by default when i go into Calendar, rather than my own empty never-used calendar?

Any help would be awesome, I've done a few searches but can't find the answer and couldn't work out if it was possible myself in settings.