X is for Xmas

I see Xmas as a Western holiday and forget (convenient or otherwise) about the religious bits. As Xmas means 25th December to me in the UK then I use it as a time to mark the midwinter and to celebrate that the days will be getting longer. Although, it always seems to get a lot colder before it get warmer even though I have grown up with traditional depictions of snowy scenes at Christmas.

X could also be for x-ray, xenophile, XX Chromosomes