Christmas

Christmas is a holiday celebrated by ponies and humans, but the context behind the holiday is unclear. In the pony realm of Equestria, an equivalent of the holiday called "Hearths Warming Eve" is celebrated instead. The holiday brings about a certain degree of merriness in individuals, often having them forget about the hustle and bustle of life and simply be kind to their fellow man. Or they can cyberbully people over the internet for being friends with the your sisters. That works too.

My Little Pony Comic
Ponies celebrated Christmas, especially the Baby ponies