Never mind that He was probably conceived on Hannukah and born in September during the Feast of Tabernacles.
Christmas is a made-up holiday, which I love to celebrate. But I would rather we live it all year long rather than expecting a secular world the pretend to be pious a couple of weeks in December.
For what it’s worth, every holiday is a made up holiday. Made up by someone.
And celebrating the incarnation/birth of Christ flows from the nativity accounts in Matthew & Luke, and the incarnation account in John.