Here is a year:
Gregorian calendar
Year=365.2425 solar days1. January31
2. February28 or 29
3. March31
4. April30
5. May31
6. June30
7. July31
8. August31
9. September30
10. October31
11. November30
12. December31

Every 400 years the leap year cycle repeats.(146,097 days or 20,871 weeks.)



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