Convert day to year (sidereal)
Please provide values below to convert day [d] to year (sidereal) [None], or Convert year (sidereal) to day.
How to Convert Day to Year (Sidereal)
1 d = 0.00273780309229384 None
Example: convert 15 d to None:
15 d = 15 × 0.00273780309229384 None = 0.0410670463844076 None
Day to Year (Sidereal) Conversion Table
| day | year (sidereal) |
|---|
Day
A day is a unit of time representing the period of one complete rotation of the Earth on its axis, typically lasting 24 hours.
History/Origin
The concept of a day has origins in ancient civilizations observing the cycle of day and night. The 24-hour day was standardized in the modern era, with the division into hours dating back to ancient Egypt and further refined through the adoption of mechanical clocks.
Current Use
The day is used universally to measure time intervals, schedule activities, and organize daily life, with the 24-hour system being the standard in most countries worldwide.
Year (Sidereal)
A sidereal year is the time it takes for the Earth to complete one orbit around the Sun relative to the fixed stars, approximately 365.25636 days.
History/Origin
The concept of the sidereal year has been used since ancient astronomy to measure Earth's orbital period relative to distant stars, predating the Gregorian calendar system.
Current Use
Sidereal years are used in astronomy to track Earth's position in its orbit relative to fixed stars, aiding in celestial coordinate calculations and star cataloging.