The twelve zodiac signs are based on the solar calendar (Gregorian calendar) birthdays.
The Gregorian calendar is based on the time it takes for the earth to orbit the sun once. Its length is three hundred and sixty-five days, five hours, forty-eight minutes and forty-six seconds. Since it is not an integer, in order to equalize the length, some years have 366 days, which are called "leap years"; some years have 365 days, which are called "normal years".
The lunar calendar is based on the cycle of the waxing and waning of the moon, that is, the synodic moon. The main characteristics of the lunar calendar are: the length of the calendar month is determined according to the celestial phenomena, that is, the phases of the moon, with the big month on the 30th and the small month on the 29th.
The twelve constellations were introduced to China from the West and belong to Western culture. They are calculated using the Gregorian calendar (the Gregorian calendar recognized in the world).
Extended information:
In Western astrology, the 12 constellations of the zodiac are synonymous with the orientation of the universe. When a person is born, each star falls on the zodiac. s position.
Twelve constellations of the zodiac (12): Cancer, Aries, Gemini, Aquarius, Virgo, Leo, Taurus, Pisces, Capricorn, Scorpio, Libra, Sagittarius.
Ranking of the twelve zodiac signs:
Aries: March 21st------April 19th
Taurus: April 20th-- ----May 20
Gemini: May 21------June 21
Cancer: June 22------ July 22
Leo: July 23------August 22
Virgo: August 23------September 22
Libra: September 23rd------October 23rd
Scorpio: October 24th------November 21st
Sagittarius: November 22------December 21
Capricorn: December 22------January 19
Aquarius : January 20th------February 18th
Pisces: February 19th------March 20th
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