Is the constellation a solar calendar or a lunar calendar?

Gregorian calendar, of course. Don't talk nonsense upstairs

The constellations come from the west. In the west, it is like the Chinese zodiac in the east.

There is no lunar calendar in the west, of course, it is calculated according to the solar calendar.

Constellations are calculated according to the solar calendar, which is the so-called Gregorian calendar, which is the western calendar. Astrology can be said to be the mother of astronomy, which was first spread in the west, so astrology is now called constellation, which is calculated according to the solar calendar.