…Yes that's a real holiday. No I'm not forgetting a different holiday. Certainly not one that involves the killing and roasting of certain large birds for a feast or any other holidays with traditions that could bring a certain yellow, animal-loving pegasus to tears at their mere description.
…So yeah, here's a picture of Big Mac and Fluttershy celebrating the holiday together by hugging a turkey. Enjoy!
Here's my Halloween/Nightmare Night picture if you missed it: