When does the conversation take place?

W: What are you reading, Paul?
M: Oh, it’s a book about naval engineering.
W: Why are you reading on Friday evening?
M: Because I’ve got to write an essay this weekend.
W: What are you going to do when you’ve qualified?
M: I don’t know. I’d like to get a job abroad, I think. What are you going to do when your year at Weston is over?
W: l’m going to spend a few weeks touring Britain, then I’m going back to Canada, I suppose.
M: What is John going to do?
W: I think he’s going to open a branch of" pretty feet"in London.
M: What is he doing in Italy?
W: He’s seeing some designers here. He’s coming back tomorrow. By the way, what are you and Sue doing on Saturday evening?
M: I don’t know yet. Why?
W: Well, I thought we could cook another of our suppers and invite John and Sue.
M: Oh, no! Not Potato Salad again! Sorry, Barbara, but I really have to read this book.