In astrology, International Astrology Day (most often observed on either March 20 or March 21) is an annual observance/holiday celebrated by astrologers and astrology enthusiasts. It is seen by astrologers as the beginning (first day) of the astrological year. It is the first full day of the astrological sign of Aries and thus marks the beginning of the Zodiac. Hand-coloured version of the anonymous Flammarion woodcut. ... March 20 is the 79th day of the year in the Gregorian Calendar (80th in leap years). ... March 21 is the 80th day of the year in the Gregorian Calendar (81st in leap years). ... An astrological chart (or horoscope) _ Y2K Chart — This particular chart is calculated for January 1, 2000 at 12:01:00 A.M. Eastern Standard Time in New York City, New York, USA. (Longitude: 074W0023 - Latitude: 40N4251) Astrology (from Greek: αστρολ&#959... Hand-coloured version of the anonymous Flammarion woodcut. ... A fundamental part of astrology is the belief that space and time (as seen from the earth) are ordered into twelve equal segments or divisions called the zodiac. ... Symbol of Aries Aries is an astrological sign that is associated with the constellation Aries. ... It has been suggested that this article be split into multiple articles. ...

International Astrology Day is celebrated/observed depending on the exact day that the Equinox actually occurs (Spring equinox in the Northern hemisphere, Fall equinox in the Southern hemisphere). This varies year to year between March 20-21, though it usually falls on March 21. In some years the day falls on March 22. Illumination of the Earth by the Sun on the day of equinox, (ignoring twilight). ... In astronomy, the vernal equinox (spring equinox, March equinox, or northward equinox) is the equinox at the beginning of spring in the northern hemisphere: the moment when the sun appears to cross the celestial equator, heading northward. ... The Northern Hemisphere is the half of a planets surface (or celestial sphere) that is north of the equator (the word hemisphere literally means half ball). On the Earth, the Northern Hemisphere contains most of the land and about 88-90% of the human population. ... In astronomy, the autumnal equinox signals the beginning of autumn in the northern hemisphere: the moment when the sun appears to cross the celestial equator, heading southward; the equinox occurs around September 22–September 24, varying slightly each year according to the 400-year cycle of leap years in... The Southern Hemisphere is the half of a planets surface (or celestial sphere) that is south of the equator (the word hemisphere literally means half ball). On Earth it contains five continents (Antarctica, Australia, most of South America, parts of Africa and Asia) as well as four oceans (South... March 20 is the 79th day of the year in the Gregorian Calendar (80th in leap years). ... March 21 is the 80th day of the year in the Gregorian Calendar (81st in leap years). ... March 22 is the 81st day of the year in the Gregorian Calendar (82nd in leap years). ...

See also

• Astrology
• History of astrology