October 1 is the tenth month of the year in the Gregorian calendar, which is widely used around the world. It has 31 days and marks the beginning of autumn in the Northern Hemisphere. This date is often associated with various seasonal changes, such as cooler temperatures and the changing colors of leaves. In many countries, October 1 is celebrated as a national holiday. For example, it is known as National Day in China, commemorating the founding of the People's Republic of China in 1949. Additionally, it is recognized as International Coffee Day, promoting the appreciation of coffee and its cultural significance.