The variety of weeks in a 12 months can range relying on the calendar system used. The Gregorian calendar, which is probably the most broadly used calendar on the earth, has 52 weeks in a normal 12 months and 53 weeks in a intercalary year. A intercalary year is a 12 months that’s divisible by 4 however not by 100, or a 12 months that’s divisible by 400. The 12 months 2025 just isn’t a intercalary year, so it should have 52 weeks.
The Gregorian calendar was launched in 1582 by Pope Gregory XIII to right errors that had gathered within the Julian calendar, which was the calendar that was used beforehand. The Julian calendar had a intercalary year each 4 years, which prompted it to float out of sync with the photo voltaic 12 months. The Gregorian calendar corrects this by having a intercalary year each 4 years, aside from years which can be divisible by 100 however not by 400.
