4. Sunday. So far the days are lined up. If you chose Bella yesterday, this morning Jill will get a free show. There's the last free roam of Season 2, the windows are finally being installed. Later tonight, the Maya Squad goes to see Sage's parents, turns out you potentially boned Jade (nice), and at the same time we find out Zoey has returned from San Diego. 4 DAYS.
5. Monday. Fuckface reunites with Zoey, he goes costume shopping with MJ/gets his dick tested/talks to Bella about Halloween and Jill/thinks about Tybalt while fucking Sage/hits up his various lovers, and plans the party with Tommy's sage advice. 5 DAYS.
6. Tuesday. It's Halloween I guess. The entire day is presumably setting up the DIK mansion, everyone getting their costumes ready, and then the party lasts all night. You break Josy's heart if you didn't choose her and Maya, as well as miss out on that hot threesome. That's a war crime. In any case, I hope you got some pussy that night, otherwise your dick goes unsucked despite having three girls in your room. 6 DAYS.
7. Wednesday. It's November 1st, no question about it. The morning is spent interacting with the various girls, playing with the stupid fucking puzzle box, cleaning the mansion, smacking Elena's ass, feeding the stupid fucking fish, and finally, we get to English class again. THE 7TH DAY.
You're missing a lot and messed up the whole timeline after the midterms and period between Halloween.
I won't be too precise, because I then have to to dig a 2 episodes script, but to be brief:
4. At the first party planning at Quinn's room Sage tells MC that planning of such party takes week(s). Let's assume at least 1 week, probably a couple, though. Maya/Josy/Sage/MC squad are not going to the Burkes right after the midterms. It took some time and it was clear. This happened in the holidays (which they got after the midterms, probably a 2-week holidays). Maybe in one week, maybe in a few days after midterms, but we see the Burkes scene as a kind of a flashback at the end of EP8 which is continued as a flashback in EP9. MC learns about Zoey during this meeting. They arrange a meeting in the park and he tells her about the incomming party and invites her to it. It's in about a week before Halloween +-. They already finished planning, started preparations, but hadn't finished. So it's safe to assume that it was a 2-weeks holidays and Burkes event happened somewhere in the middle of it. 1 week rough.
5. Not in 1 day, nor in a 5 days. Costume shopping happened definitely after the Burkes. Let's assume a few days past after that meeting. So in before some days of Halloween. Probably 2-3 days beforehand.
6. Not a 6 days. Nor after the #5.
7. Right, it's Nov, 1. And now roll back a 2 weeks and spread mentioned events in this period accordingly. Midterms ended in the mid of October +-
There was no students and teachers in the classes in the holidays period, so it's safe to assume that the class where MC and Maya had some fun during the party stayed untouched for the whole 2-weeks holidays. Maybe there should be some janitor or somebody else to came, but since there was no people, no classes goed and so on, so it wasn't needed.
Anyway it's a game and a lot of bigger and significant missteps and inconsistencies happened from time to time before. And you shouldn't demand too precise treatment for such small details. Sometimes it's just required for plot and story to left it as is even if it feels a bit off or a bit unrealistic. Such technique is used in movies and tv shows here and there so often. It turned out nice for underlining the Throuple branch dare game stuff as well as break up with Throuple. Such different emotions. Treat such details in this sight, don't overdo it or do a high math of days of janitors or you will spoil your game experience and emotional investment at some point.