What month is the twelfth month? What constellation is the twelfth lunar month?

Constellations are divided according to the Gregorian calendar (new calendar, Gregorian calendar). The twelfth lunar month is the December of the lunar calendar. When was the birthday of Gregorian calendar or what year was it born?

Aries (03/2 1-04/20)

Taurus (04/2 1-05/20)

Gemini

Cancer (22 June 2006-22 July 2007)

Leo (07/23-08/22)

Virgo (08/23-09/22)

Libra (09/23- 10/23)

Scorpio (10/24-11/22)

Sagittarius (11/23-12/21)

Capricorn (12/22-0119)

Water bottle: 0 1/ 20- 02/ 18

Pisces (02/ 19- 03/20)