I Am Your Father
Ask, answer, or vote on the meta site
In case of a post, the post must have 0 or positive score.
Earn 150 reputation points on three different sites (not including Stack Overflow) within 15 days.
Does not include the association bonus.
The 150 reputation per site must be earned within a 15-day period.
Collect 11 hats (from the same site)
Answer within 30 minutes of the question being asked, scoring 3 and getting accepted (no self-answers)
Post a message in chat within ±12 hours of the UTC New Year’s begin that gets starred (room owners pinning and unpinning their own messages works)
What's Up, Doc
Earn reputation by contributing to Stack Overflow documentation
Post five answers that each get a score of at least 3
Answer a question qualifying for the Tumbleweed badge. The answer must get accepted and reach a positive score.
Ask, answer, or vote on December 30th
The NeverEnding Story
Create or update at least two items in your Stack Overflow Developer Story
(this means updating or creating two or more items in the timeline section of the story)
Earn a silver badge
Award a bounty, to someone else, on the last day of hats
Participate in successfully closing or deleting a question
(note: flagging for closure counts; flagging as spam does not count)
Third Time's A Charm
Hit the reputation cap on three different days
Get at least 200 rep on 3 different days - regardless of the reputation cap.
Just Here for the Hat
Own any hat while the entire site collectively has at least 20 distinct hats
Search You Must
Use a site's search functionality on three consecutive UTC days (same site every day, the main http://stackexchange.com one does not count)
Bûche de Noël
Ask, answer, or vote on December 25th
Cutting the Cord
Vote on seven questions or answers using the Android or iOS app
Post at least one well-received answer on three different sites during Winter Bash (not including Stack Overflow)
La Befana vien di notte con le scarpe tutte rotte
Post or vote on January 6th
Hero of Questions
Edit a closed question (that you did not participate in closing) that gets reopened after your edit
I Have A Little Dreidel
Ask, answer, or vote on any of the days of Chanukah starting December 24-Jan 1
Answer +5 a -3 question that goes to +3
Ask a question and answer it yourself, with both posts getting a score of 3
Share a link to a question on social media that gets five clicks
(All this has to be is five unique clicks on a share link.)
Earn a gold badge
Post a question using the Android or iOS app that earns you the Nice Question badge
No Longer Grinchy
Participate in successfully reopening or undeleting a question
The question needs to remain open or undeleted. (When the hats award script is running, for this hat it's 10 minutes interval.)