The My Little Pony line included various holiday ponies throughout the years. Most of the holiday ponies had a Christmas theme, but there were also ponies for Valentine's Day, a birthday pony, and Birthflower ponies with a different flower for each month of the year.
Merry Treat was the only holiday pony that was available for purchase in stores. All of the other holiday ponies were available only through mail order offers.
Holiday ponies tend to be more rare and hard to find since they were not widely available.