I wonder if there is a little difference in meaning between "1" and "2"
1. It's about time you get up.
2. It's about time you got up.
***NOT A TEACHER***Wowenglish: I was just discussing this with someone the other day. Here's what she told me and I agree: Both are the same, but using "got" is less demanding or -- as one great grammarian put it -- more "modest." Using "get" is closer to an order. By the way, many people say, "It's high time that you get/got up."