Weeks of the year 2025 refer to the 52 or 53 seven-day periods into which the Gregorian calendar year is divided. Each year begins on a Sunday and ends on a Saturday or Sunday, with the first week of the year containing January 1. In 2025, there are 52 weeks.
The concept of weeks is based on the natural cycle of the Earth’s rotation and has been used for centuries to track time. Dividing the year into weeks provides a convenient and consistent way to measure duration, plan events, and schedule activities. Weeks are also commonly used as the basis for work schedules, school terms, and other recurring events.
