High latency conversation

Bill and I don’t talk much now that we’re not in the same apartment or even the same city, but in December, we had a lot to talk about. Here’s an unedited exchange of text messages; our only communication during this period:

Me: Happy birthday hahaha you are so old! (Dec. 15, 13 12:39 PM)
Me: I’m still in my 20s (Dec. 15, 13 12:39 PM)
Bill: Not any more. Happy birthday. (Dec. 31, 13 11:40 AM)