What constellation does September 15 belong to?

Is the constellation according to the lunar calendar or the solar calendar? What constellation is September 15? What constellation is September 15 of the lunar calendar? Many people know little about constellations. Actually, astrology is based on the solar calendar, and it was introduced to China from abroad, but foreigners don't have the lunar calendar. So the constellations are calculated according to the solar calendar. If you were born on September 15 in the solar calendar, then your sign is Virgo. If you were born in September 15 of the lunar calendar, it depends on the date of birth and converts it into the solar calendar of the year you were born.