Aries March 20th-April 20th
Taurus April 20th-May 20th
Gemini May 20th-June 20th
Cancer June 20th- July 20th
Leo July 20th- August 20th
Virgo August 20th- September 20th
Libra September 20th-October 20th
Scorpio October 20th-November 20th
Sagittarius November 20th-December 20th
Capricorn December 20th-January 20th
Aquarius January 20th-February 20th
Pisces February 20th-March 20th
If You Were Born on the 20th then you are categorized as a cusp sign so then you're that sign plus the month after
Ex: Birthday: April 20th
Aries and Taurus Cusp
Just something I'd thought I'd add in, I'm a Taurus and my moon is cancer and my rising is Libra.