Constellations are determined by the date of the solar calendar. The Gregorian calendar date on March 22nd, 2006 is April 19, and the constellation of that day is Aries.
Lunar calendar: March 22nd, o six years.
Branch: Xu Bingren Chen Wuyin
Gregorian calendar: Wednesday, April 19, 2006, Aries
Source: Hua.com.