Here's my contribution, written in a car park

It's rather in the style of William McGonagall, i.e. it doesn't scan or rhyme properly

It's rolled round again, that festive time of year
When we eat too much food, drink too much wine & beer
Spending money on gifts & sentimental cards to send
To all we call family, acquaintance or friend
Watch plays starring angels & Jesus & kings
Putting up trees & baubles & things
But, sad to say, to forget we all tend
The real meaning of Christmas - goodwill to all men
A time of renewal, the promise of life
Give thanks for the good times & shrug off the strife
Regardless of race, religion or creed
The
true spirit of Christmas is what we all need