I had to read this a few times to get it. You're talking about the medieval biphasic described in the article, the more common biphasic pattern now is the siest

I had to read this a few times to get it. You're talking about the medieval biphasic described in the article, the more common biphasic pattern now is the siesta. I had the luxury of switching to a 6am-1pm, 3pm-2am schedule in my late 20s, and I've never been better rested or more socially active. Lately I've been falling asleep at 9 and up by 4, which keeps me healthy and happy and out of bars. But siesta-biphasic is great if you can carve out the time in the afternoon for it.