How is the constellation calculated? Lunar calendar? Or the solar calendar?

Constellation divination was introduced from the west and divided according to the solar calendar.

Capricorn12/22-1/9, Aquarius 1/20-2/ 19, Pisces 2/20-3/20, Aries 3/2/kloc-.

Leo 7/23-8/22, Virgo 23-9/22, Libra 9/23-122, Scorpio10/23-1/21.