When did they meet last?

W: Hi, Fred. It’s five months since we met last time.
M: Yes, it’s a long time. I went to the south and stayed there for two months.

M: Hello.
W: Hello. This is Mary speaking. Is Wei Hue at home?
M: I’m afraid you have the wrong number.
W: Isn’t it 2587—2030?
M: No, it’s 2587—0230.