look up any word, like bae:
An internet holiday on december 18 introduced by the youtuber Alex Day in 2011 to give people the chance to buy his song 'Forever Yours' which he was trying to get to number 1 for the UK Christmas Charts - being the first unsigned artist to get to number 1 if he succeeds....

On forever day, you dress up in crazy clothes, and just have a good time!
Person 1: Why are you dressed up in crazy clothes?

Person 2: It's forever day!

Person 1: what?

Person 2: it's december 18, it's forever day!

Person 1: of course! how could I forget!
by doctorwhonerd98 December 18, 2011