Aries, the "Ram", is a constellation, one of the twelve Signs of the Zodiac. Its name is Latin for "ram", from arietare "to butt", and is not directly related to the identically-sounding name of the Greek god Ares, which Latin translates as Mars. It is the first astrological sign, and comes between Pisces the Fish and Taurus the Bull, and is associated with the beginning of the ancient calendar of the year. As a sun sign, it represents the dates of March 21 through April 20.
The Zodiac: Myths and Legends of the Zodiac Signs (astrologyclub.org)