Aries, Taurus and Gemini, if you missed them you can find them here
Cancer, Leo and Virgo here.
Libra, Scorpio and Sagittarius here.
And for Madi to answer you question......
Aries (March 21-April 20). It is considered the first sign of the zodiac as this is when Spring starts, ergo the symbolism of birth and beginnings. Also, in ancient Roman times, March was the first month of the year. It was changed to January by Julius Caesar in 46BC. Coincidentally, Aries is ruled by the planet Mars in astrology. Mars was the Roman God of war, and where the month of March got its name. The Greeks' god of war was Ares.