[teawrecks]

Either it's a 1 day work week, or his work is his life.

[Skeime]

I don’t think you can know that. He might be on campus on Tuesdays, work at home Mondays, Wednesdays, Thursdays and Fridays, and enjoy a work-free weekend.

(Though he’s an academic, so “his work is his life” is not unlikely.)