Doonesbury by Garry Trudeau for January 10, 2006
Joanie: I just don't see why you have to always keep yourself on Hong Kong time. Jeff: Because I feel like it, mom. Everyone I know stays up all night. We just have different sleep cycles, it's biology, man. Joanie: Biology? Jeff: Right. I don't see what the problem is. Joanie: Jeff, you slept through Christmas! Jeff: So? I told you just to stack my presents by my door!