I want to say that the constellation is actually not a solar calendar, but a lunar calendar! My birthday is 3. 18 in the lunar calendar, and this year is 4 in the Gregorian calendar.

what can I say? . . Constellations were originally spread to China from western countries, and the lunar calendar was not used.

Gregorian calendar, also called Gregorian calendar, is an international calendar. In astronomy, the Gregorian calendar refers to a calendar arranged mainly according to the annual movement of the sun. It has about 365 days in a year. The solar calendar is based on the running cycle of the direct point of the sun, and its average calendar year is the tropic year. There are two kinds of calendar years, one is the normal year, the other is the leap year, and the leap year is only one day away from the normal year. This kind of solar calendar is universal all over the world, so it is also called solar calendar.

Constellation originated in Babylon, one of the four ancient civilizations. At that time, they divided the sky into many areas and called these areas "constellations". But westerners usually say that birthdays are based on the solar calendar (the 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, which became 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.