Tropical year
PERIOD OF TIME FOR THE ECLIPTIC LONGITUDE OF THE SUN TO INCREASE 360°
Vernal equinox year; Solar year; Mean tropical year; Solar Year; Solar years; Tropical solar year; Tropical century; March equinox year
A tropical year or solar year (or tropical period) is the time that the Sun takes to return to the same position in the sky of a celestial body of the Solar System such as the Earth, completing a full cycle of seasons; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. It is the type of year used by tropical solar calendars.