Aries (♈︎) is the first astrological sign in the zodiac, spanning the first 30 degrees of celestial longitude, and originates from the Aries constellation. Under the tropical zodiac, the Sun transits this sign from approximately March 21 to April 19 each year. This time-duration is exactly the first month of the Solar Hijri calendar.

In astrology, planets have a meaning different from the astronomical understanding of what a planet is. Before the age of telescopes, the night sky was thought to consist of two similar components: fixed stars, which remained motionless in relation to each other, and moving objects/"wandering stars", which moved relative to the fixed stars over the course of the year(s).