At people underestimating Friday's power

Do they not realize what happened to the last song that counted the days of the week?
Friday
Yesterday was Thursday, Thursday
Today i-is Friday, Friday (Partyin')
Tomorrow is Saturday
And Sunday comes after ... wards
Partying, Partying YEAH! Fun Fun Fun Fun
I Gotta Feeling
Monday, Tuesday, Wednesday and Thursday
Friday, Saturday, Saturday to Sunday
Get, get, get, get, get with us, you know what we say, say
Party every day, p-p-p-party every day
14 WEEKS ON NUMBER ONE HERE WE GO!!!