Several Trees are refered to as Our National Christmas Tree. But, since most of them are not in National Parks, I have to assume you are referring to the General Grant Tree. Nation's Christmas Tree - Sanger, California: In 1926 Congress formally designated California's "General Grant" Sequoia as the "Nation's Christmas Tree." In 1949, nearby Sanger, California was designated as the "Nation's Christmas Tree City." A third honor was awarded on March 29, 1956, when President Dwight D. Eisenhower proclaimed the "Nation's Christmas Tree" as a national shrine to the war dead. During a Christmas ceremony each year, park rangers place a large wreath at the base of the tree.
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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.
President Ulysses S. Grant declared Christmas an official national holiday in 1870.
The National Christmas Tree is selected from a state somewhere in the US and taken to Washington D.C., where it is set up on the Capital Mall.
Alabama was the first American state to declare Christmas an official holiday. By 1890 other states also followed suit. Christmas is the only religious holiday in America, which is also a national legal holiday.
Mexico.
The official food of California is the avocado.
Uruguay's official language is Spanish. They don't have an official language and are considered the most secular country in the Americas.
In London
The best place to find information about the National Career Education Center in California is on their official website. There you will find information about course offered, financial aid and admission requirements.