Many people wonder what it means when they were born close to the day when the sun changes signs, called a "Cusp".
Astrologers suggest that births that occur approximately between the 19th-22nd of any month are born on the cusp of a sign. The only way to know the exact sign is to cast a natal chart for the time and place of birth.
Although there are differing opinions on the subject, the general consensus of opinion is that you are a blending of both signs. This is especially true if you were born at the end of a zodiac sign rather than the beginning. (Ex. Leos born on Sept 20th are near the end of the sign, so they may have some efficient and shy Virgo flavoring added to the dynamic Leo energy.)