November 30th is National Web-Standards Day. The garment of choice is a blue toque/beanie, like the so-called Godfather of Web-Standards, Jeffrey Zeldman, used to wear.
(I haven’t seen any pictures of him wearing a toque in recent years.)
In the days leading up to the event, everyone has been adding toques to their Twitter avatars. I ended up with this snapshot in TweetDeck: