You never “clock out” when you’re in grad school. I mean, yeah, you have to go to seminars and everything, but in general you pick your own seminars which is kind of like picking your own hours. There’s no time sheet, and you don’t have any jealous co-workers monitoring where you are. That sort of freedom is priceless.
All of my nights are long, morning people. All of them. No, I didn’t go to a meth-fueled rave out in the desert last night that kept me up until the wee hours (though that may have been preferable), I just had a normal night, likely in or around my own bed.