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Convert Day (d) to Week (week) instantly.

About these units

Day (d)

A day represents a full rotation of the Earth relative to the Sun, traditionally measured as 24 hours. Although the day is deeply tied to astronomy, its exact length varies due to Earth's gravitational interactions with the Moon, tidal braking, and geophysical processes. The modern civil day uses Coordinated Universal Time (UTC), with occasional leap seconds added to compensate for subtle variations in Earth's rotation. This ensures that civil time remains aligned with the real solar day. Days are fundamental in cultural, religious, biological, and economic cycles. Sleep patterns, work-rest rhythms, calendars, and circadian biology all operate on daily cycles, making the day not just a unit of measurement but a cornerstone of human existence.

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.

More Day converters

Day [d] ↔ Second [s]
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Day [d] ↔ Minute [min]
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Day [d] ↔ Hour [h]
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Day [d] ↔ Week [week]
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Day [d] ↔ Month [month]
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Day [d] ↔ Year [y]
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Day [d] ↔ Millisecond [ms]
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Day [d] ↔ Microsecond [µs]
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Day [d] ↔ Nanosecond [ns]
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Day [d] ↔ Picosecond [ps]
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Day [d] ↔ Femtosecond [fs]
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Day [d] ↔ Attosecond [as]
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Day [d] ↔ Decade [decade]
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Day [d] ↔ Century [century]
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Day [d] ↔ Millennium [millennium]
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Day [d] ↔ Shake [shake]
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Day [d] ↔ Planck Time [tₚ]
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Day [d] ↔ Month (Synodic) [month (synodic)]
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Day [d] ↔ Year (Julian) [y (Julian)]
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Day [d] ↔ Year (Leap) [y (leap)]
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Day [d] ↔ Year (Tropical) [y (tropical)]
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Day [d] ↔ Year (Sidereal) [y (sidereal)]
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Day [d] ↔ Day (Sidereal) [d (sidereal)]
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Day [d] ↔ Hour (Sidereal) [h (sidereal)]
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Day [d] ↔ Minute (Sidereal) [min (sidereal)]
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Day [d] ↔ Second (Sidereal) [s (sidereal)]
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Day [d] ↔ Fortnight [fortnight]
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Day [d] ↔ Septennial [7 years]
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Day [d] ↔ Octennial [8 years]
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Day [d] ↔ Novennial [9 years]
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Day [d] ↔ Quinquennial [5 years]
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Day [d] ↔ Quindecennial [15 years]
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Convert Day to Week