Cancer is an astrological sign which originated from the constellation Cancer, and is the 4th sign of the zodiac. Cancer is classed as a negative or feminine, introverted sign; its element is water and its quality is cardinal. Traditionally, in astrology, Cancer is ruled by the Moon.
The opposite sign to Cancer is Capricorn.
Under the tropical zodiac, Cancer is occupied by the Sun from June 22 → July 22 and under the sidereal zodiac, it is currently from July 21 → August 15. The corresponding month in the Babylonian calendar is Arax Du'uzu, dedicated to Adar. In house (Astrology) the 4th house is the house the Cancerian rules, the dates of the 4th house are September 8 → October 8.