Apparently "experts" consider a baby sleeping for a 5-hour stretch at night "sleeping through the night." Well, Aiden has been doing this since he was between 5 and 6 weeks old. But I disagree with calling it "through the night." I mean, if he goes down at 9:00pm, 5 hours later is 2:00am! That is not "through the night." That's IN the night - the middle of it. Even now, he'll go down around 9 (sometimes a little earlier or later - it's not too consistent just yet) and typically wake up between 4 and 5, which means he sleeps about 7 hours in a row. I still hesitate to call this "sleeping through the night," especially when I am not waking up for good at 4am. And especially when he goes right back to sleep, waking again 1-2 hours later, then sleeping again before finally getting up for the day.
So I'm still trying to figure out when to put that "Sleeps through the night!" sticker up on Aiden's calendar... I disagree with the "experts" out there on this one.