Generally speaking, does "constellation" refer to the solar calendar or the lunar calendar?

Astrology originated from the Babylonian dynasty in Cuba with a history of 4,000 years. They used the Gregorian calendar, which is our solar calendar. So depending on which constellation you are, it is calculated according to the solar calendar.

China introduced the solar calendar for the first time in the late Ming Dynasty. Although the lunar calendar is different, there are similarities between western astrology and ancient calendars in China. The vernal equinox (March 2 1) of the lunar calendar is the starting day of Aries, and the autumnal equinox (September 23) is the starting day of Libra. Each constellation roughly corresponds to two solar terms.