Mid-Autumn Festival Mid-Autumn Festival The Mid-Autumn Festival is a harvest festival celebrated notably by the Chinese and Vietnamese people. The festival is held on the 15th day of the 8th month of the lunar calendar with full moon at night, corresponding to late September to early October of the Gregorian calendar with a full moon at night. Mooncakes, a rich pastry typically filled with sweet bean paste or lotus seed paste are traditionally eaten during the festival. The Mid-Autumn Festival is also known by other names, such as: The festival celebrates three fundamental concepts that are closely connected: Traditions and myths surrounding
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