There are several ways to define a "year," depending on what reference point is used for a full orbit:
The time between two consecutive perihelion passages (the closest point to the sun) (approx. 365.2596365.2596 astronomical year
Other planets have vastly different "years" based on their distance from the Sun. For example, a year on Mercury is 88 Earth days, while a year on Neptune is 165 Earth years. 4. Other Planetary Years Mercury: 88 Earth days Venus: 225 Earth days Mars: 687 Earth days Jupiter: 12 Earth years Saturn: 29.4 Earth years Uranus: 84 Earth years Neptune: 165 Earth years 5. Historical Context There are several ways to define a "year,"
days). It is slightly longer than the tropical year due to axial precession. astronomical year