GWH posted this on the HFFL forums. I just had to share it. He wrote one a few years ago and updates it every year as needed. This is 2014’s version.

The Twelve Days of Halo

by GoodWillHunter

On the twelfth day of Halo,
My new clan sent to me –
Twelve drop pods dropping,
Eleven snipers sniping,
Ten jackals creeping,
Nine wraiths advancing,
Eight grenades a-sticking,
Seven grunts exploding,
Six spartans slaying,
Five….bold marines,
Four falling drones,
Three pelicans,
Two armored gloves,
And a cartridge in my SMG!

-Sal