I've obtained a copy of an attempt by my friend Jonathan to write a Wikipedia entry for lolcats. Jonathan hates these things as much as I do, possibly even more. It starts somewhere in the middle and ends in a nervous breakdown; I think he swallowed his tongue. - Joe Mathlete
Tamara Ikenberg of The News Journal states that "some trace the lolcats back to the site 4chan, which features bizarre cat pictures on Saturdays, or 'Caturdays and STUPID FUCKING SHIT'." Ikenburg adds that the images have been "slinking around the Internet for years under various labels, but they didn't become a sensation until early 2007 with the advent of dontclickonthisitisfullofdumbassmemes.com"
The first image on "I CAN HAS CHEEZBURGER?" was posted on January 11, 2007. The use of "lolcat" to describe the phenomenon was introduced no later than June 14, 2011, when wikipedia gave gravity to an entirely superficial and annoying internet phenomenon no greater than when Power Ranger Yellow wasn't in that one episode.
lolcats.com was registered.
Lev Grossman of Time wrote that the oldest known example "probably dates to when i was living in my mom's basement", but later corrected himself in a blog post where he recapitulated the anecdotal evidence readers had sent him, placing the origin of "Caturday" and many of the images now known as huhughdsfudsfuhdsuahdsuhf no no no no no