C.S. Lewis wrote an imaginative essay about two groups of Niatirbians who celebrated two winter festivals which were called Exmas and Crissmas. Here's an excerpt:
In the middle of winter when fogs and rains most abound, (the Niatirbians) have a great festival called Exmas, and for 50 days they prepare for it (in the manner which is called,) in their barbarian speech, the Exmas Rush.
When the day of the festival comes, most of the citizens, being exhausted from the (frenzies of the) Rush, lie in bed till noon. But in the evening they eat five times as much as on other days, and crowning themselves with crowns of paper, they become intoxicated. And on the day after Exmas, they are very grave, being internally disordered by the supper and the drinking and the reckoning of how much they have spent on gifts and on the wine.
(Now a) few among the Niatirbians have also a festival, separate and to themselves, called Crissmas, which is on the same day as Exmas. And those who keep Crissmas, doing the opposite to the majority of Niatirbians, rise early on that day with shining faces and go before sunrise to certain temples where they partake of a sacred feast.
At least one Niatirbian writer maintained that the two festivals were actually one and the same. Lewis thought not.
Read the whole thing. (This link points to a column in The Denver Catholic Register containing the excerpt I posted. After a Google search, I found Lewis's complete essay posted here.)
via Ignatius Insight Scoop.