Do *you* work on weekends and holidays?
I can remember the planner at the support desk were I once worked having a similar attitude, but *he* had a nice 8:30-5, Monday to Friday job and never saw any problems, not even if you ended up working 6 days in one week.
Personally, I didn't care back then, especially because working on a weekend day not only got you 125% salary for the day, but also half a day added to your leave.
Actually, I'd love to work on Sunday, if I could get Wednesday off. I did that for some time back then. Sunday, Monday, Tuesday, day off, Thursday, Friday, day off. For me, the week felt quite a lot shorter like that, and as said, it also netted me 125% of salary for the Sunday and 4 hours of leave each time.
I built up A LOT of leave, so I could have REALLY LONG vacations, especially because I planned them around obligatory holidays half a year in advance