Name two national U.S. holidays.

The two national U.S. holidays, Thanksgiving and Christmas, are widely recognized and celebrated across the country. Thanksgiving is celebrated on the fourth Thursday in November and is a time for families to come together and reflect on what they are thankful for, often featuring a large meal that includes turkey. Christmas is celebrated on December 25th and is both a religious and cultural holiday, marking the birth of Jesus Christ for many Christians, while also being associated with various secular traditions such as gift-giving and festive decorations. Both of these holidays have significant historical and cultural importance in the United States, making them integral to the national holiday calendar. Other options listed include either state observances or holidays that do not carry the same level of recognition across the nation.