The constellation is looking at the solar calendar. The solar calendar corresponding to the third day of the lunar calendar 10 in the year when you were born is your constellation.
Libra 1/2 1 ~ 2/ 18 Leo July 23rd to August 23rd.
Pisces 2/ 19 ~ 3/20 Virgo 8/24 ~ 9/22
Aries 3/2 1 ~ 4/20 Libra 9/23 ~ 10/23
Taurus 4/2 1 ~ 5/2 1 Scorpio10/24 ~1/22.
Gemini 5/22 ~ 6/2 1 Sagittarius11/23 ~121
Cancer 6/22 ~ 7/22 Capricorn 12/22 ~ 1/20