It seems that the Montgomery County, MD school district has removed religious holidays from its school calendar with the expected upset from the usual crowd.
That was the reason that George Washington attacked the Hessian forces in Trenton, NJ on Christmas Eve: It wasn't a holiday for the Continental soldiers. In fact, the US Congress was in session on December 25, 1789, the first Christmas under America’s new constitution. Gradually, some states made it a legal holiday with the first three states to make Christmas a legal holiday were in the South: Alabama in 1836, Louisiana and Arkansas in 1838. Christmas was finally proclaimed a holiday by the United States Congress in 1870: 81 years after the founding of the US.
The real problem with Christmas is that there are both secular and religious celebrations of the holiday with the addition that the two different parts of the Christian Church Eastern and Western celebrate the holiday a couple of weeks apart. In fact, how many people actually know what exactly is meant by the 12 Days of Christmas, let alone still celebrate them? In fact, you could have a seriously long Christmas celebration if you wanted to begin with Advent and go to Candlemas. I've heard some celebrations begin with All Saints Day and go to Candlemas.
Maybe you get the picture here, or maybe you don't. The bottom line is that the US has some serious decisions to make if they truly want to place "Christ in Christmas".
Especially, since some Christian sects still don't see it as a Christian holiday.
Maybe the solution is to just take the Month of December off work.