Convert Week (week) to Year (Leap) (y (leap)) instantly.
About these units
Week (week)
A week consists of seven days, a structure stemming from ancient Babylonian and Near Eastern traditions that associated each day with a celestial body (Sun, Moon, and five visible planets). The seven-day week spread through Judaism, Christianity, and Islam, becoming one of the world's most persistent cultural time cycles. Unlike the day, month, or year, the week has no astronomical basis—its endurance is purely cultural. Yet it organizes labor systems, religious observances, markets, and global business schedules. The survival of the week across millennia demonstrates the remarkable staying power of cultural tradition, transcending scientific revolutions, political changes, and the rise of international standardization.
Year (Leap) (y (leap))
A leap year contains 366 days, occurring roughly every four years in the Gregorian calendar to correct for the fact that a tropical year is not exactly 365 days. Leap years prevent seasonal drift by compensating for the extra 0.2422 days in each solar year. Without leap-year corrections, seasons would shift by one full day every four years, eventually placing summer in December over the course of centuries. Leap years are essential to maintaining synchrony between human calendars and Earth's orbital mechanics, illustrating how civil timekeeping must regularly adjust for astronomical reality.