1. solar year
Wikipedia definition
2. Tropical yearA tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun.
Read “Tropical year” on English Wikipedia
Read “太陽年” on Japanese Wikipedia
Read “Tropical year” on DBpedia


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