With typical work weeks in mind, midweek makes more sense to avoid conflicting with weekends.
(and here's why we don't have unanimous agreement—it's always the little details that hang people up)
What we need is the ability for people to get their ballot easily, return it when they want.
Where I live, I get my ballot for every election in the mail, I fill out at home. I then walk it down to a secure ballot drop box a few blocks away. Everyone should have this experience.
PS: the disadvantage of fixing vote-by-mail is that voting is run by 50 states, with wildly different standards in each (and some run by politicians that are opposed to the entire concept.) Whereas a Federal election-day holiday is at least just one vote by Congress.
I agree on the holiday. It’s fine if they want to do it, I’m not against it. I just think it’s not the thing we need to be demanding.