Pretty much everyone I've talked to so far today has said, "I keep thinking today is Friday." It certainly feels like it. WTF, it's only Thursday. Why does this happen?! 
Maybe you are getting laid off later today and everyone knows it and you sense this is your last day.
Same here, in fact a few of us in the office were talking about this earlier. I think maybe the weather finally changing around here might have something to do with it.
It's cause of last week, having had Labor Day off made Friday roll around faster.
What does the weather have to do with thinking it's Friday?
I think akahoovy has it right.
Why does today feel like Friday?!
Because it is !!! I'm off tomorrow ... WooT !!!
Funny you bring this up, I have tomorrow off, so its definitely Friday here.
Good times.