The twelve constellations are based on the Gregorian calendar, not the lunar calendar.
The twelve constellations are the contents of western astrology. According to the western saying, when a person is born, the positions of the stars all fall on the ecliptic, which shows a person's innate character and talent.
In the west, the zodiac is divided into twelve constellations, called the zodiac, followed by Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.
Extended data:
More than 2000 years ago, Greek astronomer Baccus divided the ecliptic into 12 segments to show the position of the sun on the ecliptic. The spring is divided into 0, and every 30 degrees is a palace from the vernal equinox (that is, the ecliptic is 0).
Named after the main constellations contained in the palaces at that time, including Aries, Taurus, Gemini, Cancer, Lion, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. It is called the zodiac and has twelve constellations.
Babies born when the earth moves to every fraction (constellation) will always have some similar characteristics when they grow up, including behavioral characteristics. Connecting these associations (rich imagination and creativity) in series makes these constellations human.
Later, it added the color of myth and became an important part of culture (mainly Greek and Roman mythology). This set of numerology has evolved for at least five thousand years, and they are represented by these twelve constellations.
Astrology believes that each constellation has a corresponding relationship with all aspects of human beings.
References:
Twelve constellations _ Baidu Encyclopedia