The constellation is determined by the date of the solar calendar. The solar calendar date of the Double Ninth Festival in 2000 was 65438+10.6, and the constellation of that day was Libra.
Lunar calendar: September 9, 2001.
Four pillars: one child and one child in Chen Geng.
Gregorian calendar: 20001Friday, October 6th +65438 Libra.
Source: Hua.com.