A lot of people don't realize that the Sun moves through the 12 signs on different dates each year. If you're born close to the border of two signs, you're on the cusp, and it could go either way.
For the exact degree, look at your birth chart or have a professional draw up your chart. Where was the Sun (astrologically) when you were born?
These are the dates from 2014, and give you a rough estimate of the degrees. What's your sign? Find out below.
Aries March 20th to April 20th
Taurus April 20th to May 21st
Gemini May 21st to June 21st
Cancer June 20th to July 21st
Leo July 22nd to August 23rd
Virgo August 23rd to September 23rd
Libra September 23rd to October 23rd
Scorpio October 22nd to November 22ndth
Sagittarius November 22nd to December 22nd
Capricorn December 22nd to January 20th
Aquarius January 20th to February 18th
Pisces February 18th to March 20th
Born on the Cusp: These dates change every year, and the ones above are for 2011. Find out which sign you were born in with an ephemeris, birth chart or asking an astrologer. If you were born near the end or beginning of a sign, you were born "on the cusp." This means you're a blend of the two, and will find insights reading up on both Sun signs.