Past costumes

Well, 99,9 % my buddy @actress , those costumes might appear again.
From the Candy Crush Friends Wiki, I read that Santa Costume for Yeti appeared in Chrismas 2018 with a Star Chaser Event while Tiffi's Turkey Costume appeared in Thanksgiving 2018 with a Star Chaser Event too.
You see, I think that some certain costumes like these two can appear in certain events like Christmas or Thanksgiving etc...
So, you have to wait a little and see if they will gonna appear. 

I second that. I was hoping that they bring back a chance to get the yeti santa costume this Christmas !! I missed out by a few stars last year!!