My current maid is a locally available one who just finished contract. When I interviewed her, I asked her whether she could work on Sundays. She said yes and she did not refuse so far whenever I asked her to work on Sundays. I pay her for those days.
I told my maid before I hire her that she will need to work on Sunday. She said ok.
Then, when she started work, I told her to work 2 Sunday and off on 2 Wednesday, 2 Sun each month. She was very unhappy. Then, I fixed with her to work on 1 Sunday and off on 1 Wed.
So far, after 2 mths, we are ok.