He slept through the night!
12 1/2 weeks
Now, before you go getting all excited for us, the definition of "sleeping through the night" by all the baby experts is sleeping for at least five hours straight. Usually he sleeps for 2-3 hours at a time during the night before needing to be fed. Last night he fell asleep at 10:00 pm and didn't wake up for his next feeding until 3:30 am!
Unfortunately, I woke up on my own at 2:00 wondering why he wasn't hungry and again at 2:30, so it's not like I got to enjoy this solid block of sleep. But still, this is a good sign. Maybe he'll do it again tonight!