Oh, I'm sorry, but I never think of such things - I am not that much religious and am glad, that I remember our own holidays ;)
I like Christmas for it's meaning as the feast of love, where the families, friends and even other people come together and celebrate or just are happy and have fun, never mind what god they believe in ... and I don't like the commercial part of Christmas.
So, you have Christmas twice - you can celebrate twice or even longer than the rest of the world ... cool 😉
!BEER