Noun
the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
Source: WordNetEach Gregorian year has either 365 or 366 days (the leap day being inserted as 29 February), amounting to an average Gregorian year of 365.2425 days (compared to a solar year of 365.2422 days). Source: Internet
A solar year is about 365 1 / 4 days, and 12 months is about 354 3 / 8 days. Source: Internet
In each solar year (1 January to 31 December inclusive), the lunar month beginning with an ecclesiastical new moon falling in the 29-day period from 8 March to 5 April inclusive is designated as the paschal lunar month for that year. Source: Internet
Because there are slightly more than twelve lunations ( synodic months ) in a solar year, the period of 12 lunar months (354.367 days) is sometimes referred to as a lunar year. Source: Internet
A solar year is actually slightly shorter than 365 days and 6 hours (365.25 days). Source: Internet
Astronomy main Tablets dating back to the Old Babylonian period document the application of mathematics to the variation in the length of daylight over a solar year. Source: Internet