Because if it is I would appreciate somebody helping me out in giving my Bob here a holiday hat. I've noticed a good amount of users here pulling out the santa hat avatars so I'm guessing it's just that time again and it would be nice to join in.
EDIT: So thanks to some guys here I figured out how to use GB's hat tool for images. If you need to add a hat, just go follow these steps.
Go to "insert" then "image" in the comments.
Select "My previous uploads"
Hover over your avatar and select "edit"
Then simply adjust the hat to your liking, save the image, then select the image as your avatar.
(Just be quiet about all of this because I don't want Matty bringing out the communist robot again)