The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
273
Carols began as an old English custom called wassailing, toasting neighbours to a long life.
33
Frumenty was a spiced porridge, enjoyed by both rich and poor. It was a forerunner of modern Christmas puddings. It is linked in legend to the Celtic god Dagda, who stirred a porridge made up of all the good things of the earth.
5
Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
14
The first Christmas card was designed in 1843 by J.C. Horsley.
38
At Christmas, it is traditional to exchange kisses beneath the mistletoe tree. In ancient Scandinavia, mistletoe was associated with peace and friendship. That may account for the custom of "kissing beneath the mistletoe".
27
The definition of a white Christmas in the UK is for a single snow flake (perhaps amongst a shower of mixed rain and snow) to be observed falling in the 24 hours of December 25th.
32