What is the origin of "Fursona Friday"?

For those who don't know, Fursona Friday is a day in which people who are... well you know, post their "fursona". I can't blame them for wanting a day to show off their alternate persona's, but my question is, who started this, and how did it become a thing? I just don't want to know who's bright idea it was to create a day for furries to flaunt their autism.