There are about 52 weeks in a common year. A common calendar year has 365 days, which equals 52 full weeks plus 1 extra day. In a leap year, which has 366 days, there are 52 full weeks plus 2 extra days. So, typically:
- 1 year ≈ 52 weeks + 1 day (common year)
- 1 year ≈ 52 weeks + 2 days (leap year)
This means there are 52 complete weeks in a year, and the extra days are not enough to form another full week, except in rare calendar situations when there can be 53 or even 54 weeks counted on a calendar, but these additional weeks are partial weeks.