Mid-Autumn Festival celebrate the harvest. Chuseok (추석; 秋夕; [tɕʰu.sʌk̚]), literally "Autumn eve", once known as hangawi (한가위; [han.ɡa.ɥi]; from archaic Korean for "the great middle (of autumn)"), is a major harvest festival and a three-day holiday in North Korea and South Korea celebrated on the 15th day of the 8th month of the lunar calendar on the full moon. As a celebration of the good harvest, Koreans visit their ancestral hometowns and share a feast of Korean traditional food such as songpyeon (송편) and rice wines such as sindoju and dongdongju. Many festivals revolving around a full moon are also celebrated in
Equinox zero. Its latitude will not be exactly zero, since Earth is not exactly in the plane of the ecliptic. Its declination will not be exactly zero either. (The ecliptic is defined by the barycenter of Earth and the Moon combined.) The modern definition of equinox is the instants when the Sun's apparent geocentric longitude is 0° (northward equinox) or 180° (southward equinox). See the adjacent diagram. Because of the precession of the Earth's axis, the position of the vernal point on the celestial sphere changes over time, and the equatorial and the ecliptic coordinate systems change accordingly. Thus when specifying