December 1 is the 335th day of the year in the Gregorian calendar, leaving 30 days until the end of the year. It marks the beginning of winter in the Northern Hemisphere and is often associated with various cultural and seasonal celebrations. On this day, many countries observe important events, such as World AIDS Day, which aims to raise awareness about the disease and promote prevention efforts. Additionally, December 1 is a time when people start preparing for the upcoming holidays, including Christmas and Hanukkah, which are celebrated later in the month.