Co workers are mad

At my new job, I got a supervisor position where I am scheduled to work Monday - Friday and I the weekend off. Because my job duties need to be done during the week. I wouldn’t have much to do in the weekends.

The other supervisors sometimes have to work the weekends and they are mad because I don’t. Even tho they know that’s what my position is.

It’s so frustrating. I wouldn’t mind working the weekend either. And I can’t help it.

Any advice ?