The holiday of October 27th, commemorating the day of the birth of John Marwood Cleese.
You know him from Monty Python's Flying Circus, A Fish Called Wanda, and many many more hilarious productions.
Celebrate by hanging dead parrots from the mantle, and decorating a tree with knight's helmets and holy grails, to honor the work he has done in his life that has given us many silly quotes to say in bad British accents.
Fred: Dude! Cleesemas is right around the corner and i cant find my dead Norwegian Blue Parrot anywhere!
Luke: Its alright man, I have an extra you can borrow this year for the mantle.
Fred: Thanks, Cleesemas just isn't the same without it!