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سال

Also known as anno, annum

thumb|alt=see caption|upright=1.5|An animation of the inner Solar System planets' orbit around the Sun. The duration of the year is the time taken to go around the Sun. A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years.

AI overview

A year is the time it takes for Earth to complete one full orbit around the Sun, and it serves as a fundamental unit for measuring time in our calendar systems. The exact length varies slightly depending on how it's measured—the tropical year used in our everyday calendar is approximately 365 days, 5 hours, 48 minutes, and 45 seconds, which we account for by adding leap years to keep our calendars aligned with Earth's actual position relative to the Sun.

AI-generated from the Wikipedia summary — may contain errors.