I, think.the best national traditionally in the USA it is " Тhanksgiving Day ".
Тhanksgiving Day has been celebrated in the United States on the fourth Thursday in November, since Abraham Lincoln declared a day of thanksgiving on November 26, 1863. The mdern Thanksgiving celebration has evolved both from Lincoln’s proclaimed day of thanksgiving and what is called “The First Thanksgiving”, which was celebrated by the Pilgrims of Plymouth Colony.
Modern Thanksgiving celebrations in the United States include traditional dinners which often feature a turkey as the main course and a pumpkin pie desert along with various other side dishes and seasonal foods. Many professional and college football games are played on Thanksgiving, and the day after Thanksgiving is traditionally regarded as the official start of the Christmas shopping season.