Do You Know... (6)

...that, to some people, 4.00am on Friday is still considered Thursday night?

I was booking a cab for 4.00am on Friday morning. Simple. Straight forward. Easy to understand, right? No.

At first the driver said, "No problem." Then confusion set in. He asked whether it's Thursday or Friday.

Apparently, from the Chinese/Asian perspective, it is still Thursday night as long as the sun hasn't risen on Friday morning. Or so he said. I don't know whether he is joking or not. Is he?