Generally a pretty solid day. By the time Thursday rolls around, you are more than half-way done with the standard 5 day work/school week. Thursday's have a way of comforting many before exciting weekends.

Someone who used to be a potential girlfriend/boyfriend, but no longer is.

The worst day for a heller. It's pain in a nutshell. All related to Castiel death and love for Dean.

Friday for most college students.

The day of the week where nothing counts!
If something happens only once, and it was a Thursday, then it is as if it never happened at all.
Hands down, the best day of the week.

The day that Arthur Dent never could get the hang of.

The best day of the week to have sex. I'm not kidding. It adds a whole 'nother level to it.