At what time of the year does this conversation take place?

M: What kind of dress are you looking for?
W: I want something light to wear. Because it’s getting warm now. What material do you think would be best?
M: Let’s see what we have. What about cotton blouses for spring?
W: Yes, can I have a look?
M: We’ve got three colors: yellow, white and black.
W: Oh, I want a white blouse. I’ve got a very nice black skirt to go with it.