Oh, you dont change that code in the console
you open the .rpy file, hunt down the line "day == 2" and replace it to make it look like this "day%7 == 2".
Basically what the "%7" does is to take the days you have played so far, divide them via a code method called Modulo (Its a programming thing, I cant honestly explain the math behind it) and find what day it is. So, for example, I had played for 71 days, which would be a monday ingame. What Modulo basically does is say "71 days, divide that by weeks, find what day of the week it is, okay its a monday, so that 1" which would mean "71%7 = 1 = monday (monday = 1, tuesday =2 etc)
I'll find you the specific lines to change in the code and in what code files.