Update - Thanks community team! It's now been posted: https://pso2.com/news/announcements/holidaywear
Original post below:
Christmas on Ice gives a PSE Outfit Bonus if you wear various santa-themed outfits. This is mentioned in the datapod in the waiting room and shown in the game a short time after the quest begins:
Could we please get a list of qualifying outfits for Christmas on Ice? I've tried changing between various outfits in my possession but it doesn't update the display immediately and other people seem to be doing the same at times so I cannot get a good read on which of my outfits (if any) qualify.