Is the constellation based on the lunar calendar or the lunar calendar?

Constellations are based on the solar calendar.

The knowledge of constellations originated from Babylon, one of the four ancient civilizations. At that time, they divided the sky into many areas and called them "constellations". But westerners usually say that birthdays are based on the solar calendar (new calendar), so constellations are calculated according to the solar calendar.

Babylonians made a long-term prediction of these constellations, determined the ecliptic through observation, and divided it into 12 equal parts, becoming the zodiac. These zodiac signs are named after the 12 constellation respectively. Starting from the vernal equinox, counterclockwise is Aries (Aries), Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius (Sagittarius), Capricorn, Aquarius (Aquarius) and Pisces.

Introduction of constellation

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". Babylon has the Tigris River and the Euphrates River flowing into the Persian Gulf from northwest to southeast, so it is also called the "two-river basin" area.

After the culture of the two river basins spread to ancient Greece, it promoted the development of ancient Greek culture. Ancient Greek astronomers supplemented and developed the Babylonian constellation and compiled the ancient Greek constellation table. The constellation 12 on the ecliptic was originally used to measure time, not to express people's character as it is now.