Are the twelve constellations calculated according to the Gregorian calendar or the lunar calendar?

The following is the time corresponding to the twelve constellations, which is subject to the solar calendar.

Aries March 21-April 19

Taurus: April 20th-May 20th.

Gemini may 2 1- June 2 1

Cancer June 22-July 22

Leo July 23-August 22

Virgo August 23-September 22

Libra September 23rd-65438+1October 23rd

Scorpio 65438+1October 24th-165438+1October 22nd.

Sagittarius165438+1October 23rd-65438+February 2nd1.

Capricorn 65438+February 22 -65438+ 10/9

Aquarius 65438+1October 20th-February 18

Pisces February19-March 20