Falling on November 11 and commemorating an event that occurred on November 11, 1918 at 11AM, Veterans Day is one of 11 national holidays. Here are 13 facts you probably didn’t know about this day that was set aside to honor all those who’ve served in the US military, living and dead. 1. It was originally called “Armistice Day” and was first celebrated a year after the end of World War I. Armistice Day celebrations in Philadelphia, Pennsylvania on 11…