What would you do with an extra day in the week?
This would be a day when you wouldn't have to work...an additional weekend day. Let's say it would be sandwiched between Saturday and Sunday, so you could do the normal going-out stuff on Saturday and the normal relax-watch football and/or church and/or get ready for the work week stuff on Sunday. This would be an additional day to do whatever you wanted to!
I'd call it Yourday, since all the other good names are taken.
What would you do on Yourday???