Heres something I found posted a while back and makes it easy to remember.
M=MK, A=AK, E=EPCOT, D=Disney Studios (formerly known as MGM)
Sun--M
Mon- A
Tue- D
Wed- E
Thu- M
Fri- A
Sat- D
Spells out MADE MAD
Just start your week on Sunday and it works.
I know that I am made mad when I have to go home but happy to know I'm coming back.
I hope this helps.
Lori