VelaraWater · Cardinal · Ruled by Moon
Cancer
Cancer is ruled by the Moon, and it moves like one — in phases. It is the sign of home, memory and the people you would do anything for.
- Dates
- June 21 – July 22
- Symbol
- The Crab
- Element
- Water
- Modality
- Cardinal
- Ruling planet
- the Moon
- Exaltation
- Jupiter
- Opposite sign
- Capricorn
- Body (classical)
- Chest
Personality
The Cancer nature
Cancer is cardinal water: feeling that takes initiative. It is known for looking after people, reading a room instantly and remembering everything that mattered. Like the crab, it carries a hard shell over a soft centre — protective, sometimes defensive, and slow to trust until it feels safe. Its moods change with its inner tides.
Growth edge: Saying what it needs instead of hoping someone will notice.
Born on the cusp?
The dates move. Your chart doesn't.
The Sun is in exactly one sign at any moment, but the switch-over shifts by up to a day from year to year. If you were born near June 21 or July 22, only your exact birth time can say which side of the line you're on.
Cancer shares its element with Scorpio and Pisces. Its opposite sign is Capricorn.
Sun-sign traits describe a twelfth of the world. Your Moon, Rising and planets make them yours.
The Big Three
There's more to you than Cancer.
Your Sun sign comes from your birthday. Your Moon and Rising signs need the full date, time and place — and they change far faster.
Sun — your core self and identity. Changes sign about once a month.
Moon — your emotions and inner needs. Changes sign about every 2.3 days.
Rising — how you meet the world. Changes about every two hours on average.
The myth
The story of the crab
In Greek myth, Karkinos was a giant crab that came out of the swamp to help the Hydra fight Heracles and bit him on the foot. Heracles crushed it — and Hera, his enemy, set it among the stars for its loyalty.
Babylonian astronomers saw a crayfish here.
The ♋︎ glyph depicts the two claws of a crab.
In the night sky
Cancer among the stars
Cancer is the faintest of the twelve zodiac constellations. Its brightest star, Tarf, shines at only around magnitude 3.5.
At its centre sits the Beehive Cluster: about a thousand stars that look like a soft blur to the naked eye. Galileo was the first to resolve it into individual stars.
FAQ
Cancer, quickly
What are the Cancer dates?
Cancer season runs from about June 21 to July 22. The exact moment the Sun changes sign shifts by up to a day from year to year, so if you were born near either date, your birth chart settles it.
What element is Cancer?
Cancer is a cardinal water sign. It shares its element with Scorpio and Pisces.
What planet rules Cancer?
Cancer is ruled by the Moon.
Sources
- Theoi Project — the myth of Cancer
- Constellation Guide — Cancer
- Wikipedia — Cancer (constellation)
- Ptolemy, Tetrabiblos I (rulerships, exaltations) — LacusCurtius
- Wikipedia — Astrological sign
- Wikipedia — Astrological symbols
- Wikipedia — Zodiac Man (classical body associations)
Dates are given in UTC unless noted; local dates can differ by a day. Last checked 4 October 2026.
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