The Onion had it right. Monday you write off. It’s the first day of the week, it sucks, get over it. At least you just had a weekend.
Wednesday is Hump Day. When it’s done you’re better than halfway there.
By Thursday you can practically smell the weekend.
The eagle flies on Friday.
On Tuesday the next weekend is too far away to be more than an abstract concept, but the previous weekend is a fading memory.