Aries is the youngest of the entire zodiac. To be categorized as Aries in Sun Sign Astrology, you must be born between March 21 thru April 19 . Aries is a very youthful and innocent zodiac sign. They are ready to experience new things with everyone. They look at life as a journey of self exploration. Aries is gutsy, vocal, outspoken, courages, and strives to earn the top spots. They will go through great lengths and take many risks to achieve what their heart desires.