The "Days of the Year" refers to the total number of days in a calendar year, which is typically 365. However, every four years, an extra day is added to February, making it 366 days in a leap year. This adjustment helps synchronize the calendar year with the Earth's orbit around the Sun. Each day of the year can be associated with various events, holidays, or observances. For example, New Year's Day is celebrated on January 1, while Christmas is observed on December 25. These special days often hold cultural, historical, or religious significance for people around the world.