Christmas

Christmas is a holiday celebrated by humans on December 25th (or 24th, some places). It seems to revolve around the exchange of material goods, the slaughter and festooning of conifers, and the consumption of roasted avians. It may also be about the birth of a carpenter, but despite the many interractions of the Transformers with the humans, not a lot of data was collected about that.

Marvel Comics UK continuity

The magic of Christmas made Circuit Breaker not kill Jazz. Christmas Breaker!

The magic of Christmas made Jetfire appreciate his Earth heritage. The Gift

The magic of Christmas made Starscream realize that even if he doesn't care, helping people can make him feel... well, he still doesn't really care. Stargazing

The magic of Christmas made Optimus Prime renew his pledge to protect Earth. Cold Comfort and Joy!