What are these people planning to do?

W: I can’t make it now. Is tomorrow evening all right?
M: I guess so. The movie will be here through next week.

W: Well, this must be the National Library.
M: I guess so. Oh no! I don’ t think it’ s open today. Look. It says "Closed Tuesdays".
W: Well, we’ll just have to come back tomorrow.
M: But we’ re supposed to go on that tour tomorrow.
W: Oh, that’ s right. I forgot all about it. How about the day after tomorrow then?
M: It’s OK with me.