Aries did not come into existence in any biological or physical sense. It is an astrological sign associated with the period of March 21 to April 20. In Western astrology, the signs of the zodiac are assigned based on the position of the sun at the time of a person's birth. The association of the word Aries with this particular time period is derived from the constellation of Aries, which occupies a specific region in the night sky.