Is the next constellation based on the national calendar or the lunar calendar? Please give an explanation!

Constellations are calculated by the Gregorian calendar. Constellation is an algorithm in the west, but all western countries use Gregorian calendar, and there is basically no calendar recording method. China has a history of 5,000 years, and a calendar recording method was established long ago. But considering that calendars are used all over the world, in order not to cause communication obstacles on calendar issues, I used the Gregorian calendar. At the same time, considering the use of agriculture in China, there are two ways to use it.