What birthday is the constellation based on _ What birthday is the constellation based on?

Is the constellation based on the lunar birthday or the solar birthday?

The constellation is calculated according to the birthday of the solar calendar.

Constellations originated in the west, so they are judged according to the birthday of the solar calendar. The zodiac signs include Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.

Constellations are divided according to the solar calendar, which is the world Gregorian calendar. Because the world Gregorian calendar originated from Christianity, and the constellation is also a system formed by combining celestial constellations with time calendars by Greek astronomers, the division of the twelve constellations must be based on the Gregorian calendar.

The twelve constellations spread from the west to China, so the date is calculated according to the western date. Constellation refers to one of the indispensable components of astrology, and also refers to the combination of stars in the sky. Since ancient times, human beings have associated three or five stars with their mythical figures or artifacts, which are called "constellations".

Constellation is a means to determine the orientation of the sky in almost all civilizations, which is widely used in the field of navigation:

The division of constellations is completely artificial, and different civilizations have different divisions and names. Constellations have no uniform and precise boundaries. Until 1930, in order to unify the complicated constellation division, the International Astronomical Union divided the sky into 88 official constellations with precise boundaries, so that every star in the sky belonged to a specific constellation.

Most of these official constellations are based on ancient Greek myths handed down from the Middle Ages. In contrast, some widely circulated star combinations are not recognized as official constellations, such as the Big Dipper.