Aries
Aries is the zodiac sign for people born between March 21 and April 19. Element: fire; modality: cardinal; ruling planet: Mars. The cusp dates shift by a day from year to year, so if you were born near a cusp, check your sign with the calculator.
Personality
Aries is the first sign of the zodiac, and it shows in everything: Aries starts things. Where others weigh their options, Aries is already acting, and often wins precisely because of speed. Plenty of energy, little patience.
Strengths: initiative, directness, courage, no scheming. Aries says what it wants and doesn't know how to play a long game against anyone.
Weaknesses: a quick temper, impatience and projects abandoned halfway. Aries catches fire faster than anyone and is the first to lose interest once a task turns into routine.
The Gemini man and woman
The Aries man is competitive and direct, and can't stand having decisions made for him. He courts assertively and cools off quickly if there's nothing left to win.
The Aries woman is independent and active; she wants an equal, not a protector, and sees being looked after as an attempt to restrict her.
Career and money
Anything that calls for a fast start and drive suits them: sales, sports, entrepreneurship, crisis projects, the military and police, surgery.
Aries earns money in bursts and spends it easily. Systematic saving doesn't come naturally; the only thing that helps is automatic saving that doesn't require their involvement.
Compatibility
Traditionally, the easiest matches are signs of the same element and of compatible elements; for Aries these are Gemini, Leo, Sagittarius and Aquarius.
The most challenging are signs in square and in adjacent positions: Taurus, Cancer, Capricorn and Pisces. The opposite sign is Libra: strong attraction and an equally strong struggle.
These are general rules of aspects, not a verdict. Each pair is covered separately in zodiac compatibility.
The sign in the birth chart
Your Sun sign is just the position of the Sun at the moment of birth. A full birth chart also includes the sign of the Moon (emotions), the Ascendant (first impression) and the positions of the other planets.
That's why a person may "not seem like an Aries": they have an Aries Sun, a Cancer Moon and a Libra Ascendant, and what comes across is nothing like a Martian manner. Horoscopes in the media work only with the Sun sign, hence the feeling that they aren't about you.