May 3 1 is Gemini.
The following are twelve constellations for your reference.
Date of birth of constellation
Aries 03/2 14/ 19
Taurus 04/20-05/20
Gemini 05/2 1-06/20
Cancer 06/2 17/22
Leo 07/23-08/22
Virgo 08/23-09/22
Libra 09/23- 10/22
Scorpio10/23-11/21
Sagittarius11/22-12/21
Capricorn12/22-0119
Aquarius 0 1/20-02/ 18
Pisces 02/65438