International Astrology Day takes place on the day, the spring equinox in the northern hemisphere occurs, and therefore in 2017 on March 20. The date was chosen, since it is one of the most important dates for astrology and astronomy. International Astrology Day is an annual observance, which is celebrated by astrologers and astrology enthusiasts. It was initiiated by the Association for Astrological Networking in 1993, and replaced the previous observance called "Astrology Awareness Weekends". 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 tropical Zodiac.