When is the conversation taking place?

W:You are going to wear out that computer?
M:0h, hi. What are you going to do here at this time?
W:I should ask this question.Do you have any idea what time it is now?
M:Oh, it maybe about ten or ten thirty.
W:It’s nearly midnight.
M:Really? I didn’t have any idea it was so late.
W:Don’t you have an early class tomorrow morning?
M:Yes, at seven.My experiment class, the students will go to work by themselves.
W:Then you should go to bed right now.
M:OK.