A meme created by 4chan, NOT MYSPACE, that many forums and discussion boards have adopted.
Caturday is a fun day because cats with text below them make me laugh.
by SweetMetalForever October 24, 2006
The greatest holiday on the internets. A day to celebrate the greatness that is Felis Domesticus, or the common house-cat.

Despite popular thinking, LOLCats RIPPED OFF the meme from /b/. Not to say that it wasn't a stupid thing to begin with, but still...
You know what day it is? Do you?

It's Caturday, bitches.

So get off of your assess...

...and post some fucking cats.
by sir_lancelot_the_brave July 11, 2008
A glorious holiday in which the feline race is celebrated.
"Mom, how come there's a mother's day and a father's day, but no caturday?"

"Every day is Caturday."
by Meeshee Batog April 26, 2008
Gameday in Manhattan, Kansas, for the Kansas State Wildcats sports event that is happening.
Frat 1: Dude wake up it's Caturday! We gotta head down to the Bill!
Frat 2: Alright lets head down there and whoop up on Kansas.
by BillSnyTheFootballGuy December 5, 2017
Game day at the University of Kentucky. Caturday is on Saturdays. Go cats.
Kentucky football plays today...it’s Caturday!!!
by 411Truth October 7, 2018
Two Saturdays of every month in which the majority of the day is spent photographing one's cat to later post those pictures on a myspace bulletin so that people may comment on them. Sadly, men also participate in this activity as proven by the originator "Chaz". In short, it's pussies taking pussy pictures of pussies for other pussies to post pussy comments on them.
Craig: "Have you seen the latest Caturday pics on my bulletin? Comment on them, won't you?"
Derek: "Get away from me."
Jader: "lol"
by Gypsy aka Buggs August 19, 2006
Though the origins are fuzzy, Caturday was spawned on one of the many *Chan image boards by the user Anonymous. On every Saturday, you post cats for lulz.
by Anon McAnonymous October 22, 2007