Christmas is a national holiday because it is one of the most important celebrations in many cultures around the world. It marks the birth of Jesus Christ and is celebrated on December 25th. It is a time of joy and generosity, where people come together to share gifts, spend time with loved ones, and reflect on the meaning of the holiday. Christmas is also a time of giving back, with many people donating their time, money, or resources to those in need. Additionally, the day after Christmas, known as Boxing Day, is a public holiday in many countries, allowing people to continue celebrating and giving back.