The variety of weeks in a yr can fluctuate relying on the calendar system used. The Gregorian calendar, which is probably the most extensively used calendar on the planet, has 52 weeks in a normal yr and 53 weeks in a intercalary year. A intercalary year is a yr that’s divisible by 4 however not by 100, or a yr that’s divisible by 400. The yr 2025 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 collected within the Julian calendar, which was the calendar that was used beforehand. The Julian calendar had a intercalary year each 4 years, which brought about it to float out of sync with the photo voltaic yr. The Gregorian calendar corrects this by having a intercalary year each 4 years, aside from years which are divisible by 100 however not by 400.
