The Winter Wonder Hunt is still going for most of this month (ends the day after Christmas, I think!). It's not really a hunt-hunt, it's a story event with quests to earn things to turn in for prizes. The prize you can redeem from me is a stuffed Krampusling (because I have Krampus on the brain lately). You can find instructions on how to do the hunt at the official site.
It's a little Nightmare Before Christmas in theme- Karuma Tengu has injured Santa Claus by accident, and now Christmas is ruined! The yokai don't want the children to be sad, so they are going to save Christmas, even if they have no idea whatsoever what they are doing. This leads to best new sleigh for Santa and BEST CAKE EVER. Santa tries to be super diplomatic about it all. You get to pick whether you want to do quests in JiPang (the spooky side of the sim with the yokai!) or Santaburg first. You will get a little companion (you must allow your companion to rez and attach to be able to complete quests!) to help you on your quest, as you collect materials to make things for people and run errands for them (there are permanent versions of the quest companions to be found in each half of the sim as well- not for doing the quests, but for keeping with you later!). You are rewarded with coins that can be redeemed for prizes for the quests- many are repeatable so you can pick an easy one (cat booze!) to grind for more coins.