Edwardo: "Nah, man...that's on Sundays"
Polio: "Why don't we go to the petting zoo?"
Edwardo: "Shiii...Sundays, motha fucka, Sundays..."
Also the day when people are supposed to go to church but don't go because of hangovers or just forget.
Guy 2: Damn that means tomorrow is monday. What a bummer.
It is also the day people get their homework done, last minute.
See Sunday afternoon