Yus, it is.
I'm currently on Day 3, but I died and lost a half hour of game time, so I turned it off and stopped playing for a little while. I'm probably about to go play it for a little bit before I doze off at the computer~
I find it odd... many days when it ISN'T a school night, I find myself getting tired earlier than on school nights.
On another random note: Lol, I started my swimming unit in P.E. today, and my fingernails turned purple from being wet and cold at 9 in the morning. I think that's the first time that's happened, or at least that I know of... I used to think the whole "nails turn purple, lips turn blue" things were a bit of an exaggeration, apparently not, lol.