National Day, also known as National Day and National Day Anniversary, refers to a legal holiday established by a country to commemorate the country itself, usually the independence of the country, the signing of the constitution, or other significant anniversaries. On this day, every country will hold various celebrations. In my country, National Day refers specifically to the anniversary of the official founding of the People's Republic of China. Therefore, people all over the country will celebrate on October 1st each year. October 1, 2021 is the 72nd anniversary the founding of the People's Republic of China.