The variety of weeks in a yr can fluctuate relying on the calendar system used. The Gregorian calendar, which is essentially the most broadly used calendar on the earth, has 52 weeks in a regular yr and 53 weeks in a bissextile year. A bissextile year is a yr that’s divisible by 4 however not by 100, or a yr that’s divisible by 400. The yr 2025 shouldn’t be a bissextile year, so it would have 52 weeks.
The Gregorian calendar was launched in 1582 by Pope Gregory XIII to right errors that had amassed within the Julian calendar, which was the calendar that was used beforehand. The Julian calendar had a bissextile 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 bissextile year each 4 years, aside from years which are divisible by 100 however not by 400.
