Are the twelve constellations based on the lunar calendar or the Gregorian calendar?

The twelve constellations are based on the birthday of the Gregorian calendar.

The solar calendar takes one year as the time for the earth to go around the sun. Its length is 365 days, 5 hours, 48 minutes and 46 seconds. Because it is not an integer, in order to balance the length, some years are 366 days, called "leap year"; Some years are 365 days and are called "average years".

The lunar calendar is based on the cycle of the moon, which is the new moon. The main characteristics of the lunar calendar are: the length of the calendar month is determined according to the astronomical phenomena, that is, the moon phase, with the big month on the 30th and the small month on the 29th.

The twelve constellations spread from the west to China, belonging to western culture, and calculated by the solar calendar (the world-recognized Gregorian calendar).

Extended data:

In western astrology, the zodiac 12 is synonymous with the orientation of the universe. When a person is born, the stars will fall into the position of the zodiac.

Twelve horoscopes (12): Cancer, Aries, Gemini, Aquarius, Virgo, Leo, Taurus, Pisces, Capricorn, Scorpio, Libra and Sagittarius.

Twelve constellations sort:

Aries: March 21-April 19.

Taurus: April 20th-May 20th.

Gemini: May 2 1- June 2 1.

Cancer: June 22-July 22.

Leo: July 23rd-August 22nd.

Virgo: August 23rd-September 22nd.

Libra: September 23rd-65438+1October 23rd.

Scorpio: 65438+1October 24th-165438+1October 2nd1.

Sagittarius:165438+1October 22nd-65438+February 2nd1.

Capricorn: 65438+February 22nd -65438+ 10/9.

Aquarius: 65438+ October 20th-February 18

Pisces: February 19-March 20.