Do you mean Christmas, or what holiday in particular?
yes it is.
Christmas is an official holiday in the US. Just because some people don't celebrate it, doesn't mean it isn't a national and official holiday.
christmas
Christmas
1870
1870
Christmas eve
No. The most decorated US holiday would be Christmas.
Christmas is a Christian Holiday. It has become more of a secular celebration and is a National Holiday in the US. Those that are not Christian do not celebrate the religious holiday.
viginia
Christmas tree