When did the two people see each other last time?

W: Well, Jerry, what a surprise! It’s nice to see you again.
M: Hello, Grace! My gosh! How long has it been? Wasn’t it a year ago on Christmas Day that I last saw you?
W: Yeah, I think you’re right. How’s your wife and the kids?
M: Oh, they are fine. Billy fell down and broke his leg a few weeks ago. But other than that, there’s been nothing special.
W: Wasn’t Joey learning to play the piano? I seem to remember something about that.
M: Oh, he’s given that up already. He’s all excited about sports now. Actually I don’t mind.
W: And your wife, what is she doing these days?
M: She’s going to a night school on Mondays and Wednesdays. She’s studying German now. But last year she studied painting and typing. I think she just enjoys going to school. Next, it’ll probably be cooking.
W: How nice for her. Oh, I’m sorry. I’ve got to rush. But say hello to your wife for me, will you?
M: Sure, I will, and remember me to your husband. Goodbye.