There are many anniversaries that we could celebrate - instead of Xmas per se, how about the pagan anniversary of the Winter equinox (22nd December). Xmas was actually perloined from the pagans to create Xmas anyway, so we could revert to the previous anniversary and celebrate that instead.
True. I have had Journey’s “Don’t Stop Believing” stuck in my head for a couple of days now. TNP brought their lunch to work today