Palin the clueless probably has no idea at all that a significant fraction of the founders/early settlers of the US wanted to have nothing to do with Christmas.

Puritans etc. disapproved of Christmas because it was fun.

Palin the clueless probably also has no idea that Christmas is not an especially significant date in the Christian calendar. It was useful as a way to appropriate pagan solstice celebrations.

However, the high holy days of Christianity have always been Good Friday and Easter Sunday.