“Why cant you just call on Wednesday or latest Thursday??!”
In general — certain things need to be taught. You may think that certain things may be intuited by “kids” — but its just not so. I am pretty sure that i didnt have that sensitivity when i was in Israel in 80’s. I think — you as the host can say — we would love to have you but please call me (and most people) earlier in the week because thats when we make our plans. Nothing wrong with that.
I have distinct memories of being taught explicitly certain lessons of ettiquette and teaching my children the same. (And no, Im not that proper — but reminding your children to offer to help clear the table etc…is not the worst thing).