I don't know if this is true...... they said that this will not serve as knowing your future but just a simple guide to know your personalities, i cant say that this is my personalities, though some of it i can relate. :-)
Aries, the ram, is the first astrological sign of the zodiac and its origins are from the Aries constellation..
Zodiac Symbol Ram
Birth Dates (Tropical) March 21 - April 19
Birth Dates (Sidereal) April 15 - May 15
Zodiac Element Fire
Zodiac Quality Cardinal
Aries, the ram, is the first astrological sign in the Zodiac, originating from the constellation of Aries. In western astrology, this sign is no longer aligned with the constellation as a result of the precession of the equinoxes. In astrology, Aries is considered a "masculine", positive (extrovert) sign. It is also considered a fire sign, and is one of four cardinal signs. Aries is ruled by the planet Mars. Being the first sign in the zodiac, Aries is associated with the astrological 1st house.
Individuals born when the Sun was in this sign are considered Aries individuals. Under the tropical zodiac, the Sun is in Aries roughly from March 21 to April 19, by definition beginning at vernal equinox. Under the sidereal zodiac, it is currently there roughly from April 19 to May 19.
In mythology, Aries is often associated with the Greek myth of the ram which carried Athamus' son Phrixus and daughter Helle to Colchis to escape their stepmother Ino, as well as the mythological figure of Theseus, from the Greek myth of the Minotaur.
The astrological symbol for Aries is said to represent the head and horns of the ram, and originates from the cluster of stars which constitute the head of the Aries (constellation), according to the work of Doctor Acacandam dating from 1592. The head of Aries is given the name of Aluathay or Salhay, and it consists of four stars.
The following traits are widely associated with this sign.* Self-confidence * Courage [5* Impatience * Impulsivity * Enthusiasm * Initiative * Leadership * Opinionated * Forceful * Irritable * Straightforward 
Many astrologers believe that each sign of the zodiac has identifiable physical traits. Aries are believed to have a strong, athletic, well-proportioned body. They also can have an elongated face with a well-rounded and broad forehead. The chin is also prominent. Many females will have definitive jaw lines and accentuated cheekbones. Males will possess a dominate Adam's apple. Both will have strong eyebrows that knit together as well as clear and penetrating eyes. There is a ruddy cast to the complexion and the noses of both sexes are high-bridged and straight.
Aries is widely thought to be compatible with same element signs, Sagittarius and Leo.
There are many variables that determine compatibility in astrology, such as birth dates, birth months, birth years, position of a sign within the Sun, the Moon, Stars, etc. The signs listed as compatible with Aries do not reflect an individual profile or individual reading as interpreted within astrology, but rather reflect a general guideline and reference to compatibility as dictated by variables such as Qualities and Elements within the Zodiac. 
Professional astrologers rarely boil compatibility down to just the sun-sign. The branch in astrology dealing with interpersonal compatibilities is called Synastry.
Birthstones Aquamarine (March)• Diamond (April)
Gemstones Bloodstone • Amethyst • Carnelian • Coral • Malachite • Rose Quartz
Metal Iron • Copper
Flowers  Honeysuckle & Sweet pea
Countries  England • France • Germany • Poland
* The Indian equivalent of Aries is Mesha.
* The corresponding month in the Babylonian calendar is Arax Nisânu, dedicated to Anu and Bel. * The Chinese equivalent is thought to be the energetic, confident Dragon, whose lunar month is from 5 April - 5 May, i think i am between aries and pieces. :-)