Aries, "The Ram", is an astrological sign that originated from the constellation Aries, and is the 1st sign of the Zodiac. Aries is classed as a positive or masculine, extrovert sign; its element is fire and its quality is cardinal. Traditionally, in astrology, Aries is ruled by the planet Mars.
The opposite sign to Aries is Libra.
Under the tropical zodiac, Aries is occupied by the Sun from March 21 → April 19, by definition beginning at vernal equinox. Under the sidereal zodiac, it is currently from April 19 → May 19. The Pisces-Aries Cusp dates are between March 19 → April 23. In House (astrology) the 1st House is the house the Arian rules, in the 1st House dates are occupied on June 21 → July 22. The corresponding month in the Babylonian calendar is Arax Nisânu, dedicated to Anu and Bel.