Cancer Zodiac Sign

Cancer is the fourth sign of the zodiac, the sign of the Crab (♋︎). In the tropical zodiac the Sun is in Cancer from about June 20 to July 22, US Eastern Time; its first day moves between June 20 and June 21 from year to year. Astrology describes Cancer as a Cardinal Water sign ruled by the Moon.

Cancer at a glance

• Dates (usual): June 20 – July 22 (US Eastern Time)
• Symbol: The Crab
• Glyph: ♋︎
• Element: Water
• Modality: Cardinal
• Ruling planet: Moon (traditional and modern)
• Polarity: Negative / feminine (yin, receptive)
• Opposite sign: Capricorn

Born near the start or end of Cancer? Check your Sun sign in your birth chart

Cancer sign zodiac lists often disagree by a day, some opening the season on June 20 and others on June 21. Each is right for some years. A calendar year and the Sun's annual cycle are not the same length, and leap days pull the calendar back into step, so the Sun reaches 90° of celestial longitude, the start of Cancer and the northern summer solstice, at a different hour each year.

In US Eastern Time from 2020 through 2030, the Cancer sign begins on June 20 in six years and on June 21 in five, and its last day is always July 22. Exact Cancer sign dates and times for 2025–2027, from NASA JPL Horizons ephemeris data:

The 2025 row shows why the clock matters: 10:42 PM on June 20 in New York was already June 21 in UTC. It works the other way too: a change shortly after midnight Eastern Time still falls on the previous calendar day in Pacific Time.

If your birthday is a change day (June 20 or 21, or July 22), the time and place of birth settle it, because at that moment the Sun was in one sign only. People call these "cusp" birthdays, but the popular word does not put the Sun in two signs at once. The birth chart answers the question once you add the hour and city of birth.

The tradition builds the Cancer portrait from three ingredients. Water gives it a feeling-led nature, and the Moon, its ruler, ties it to care and home. Cardinal modality, given to the signs that open a season, is associated with action. Put together, astrologers describe a sign that feels first and then moves to protect what it values: a household, an old circle of friends. Its receptive polarity keeps that drive quiet rather than loud.

Before matching any of this to yourself, keep in mind that astrology is an interpretive tradition rather than a scientifically validated method; the lists below describe themes, not diagnoses.

Strengths in the tradition

• Initiative for others (Cardinal): Cancer is read as the one who gets things moving when people need help: organizing the move, calling the landlord about the broken heater, planning the reunion nobody else got around to.
• Protectiveness (Moon and Cardinal): The tradition pictures this sign speaking up for a friend in a meeting, even when it would rather stay out of the spotlight.
• A sense of home (Moon): Astrologers link the sign with hosting instincts: the spare key, the guest room kept ready.
• Lasting friendships (Water, receptive polarity): Trust is slow to form and, once given, tends to last for years.

Challenges in the tradition

• Overprotecting (Cardinal and Moon): The urge to step in can turn into fixing problems other people wanted to handle themselves.
• A closed inner circle (receptive polarity): New colleagues or a partner's friends may find it hard to get past polite and into close.
• Carrying too much (Cardinal Water): Looking after everyone can crowd out saying plainly when the load has become too heavy.

The name is Latin for "crab," and the Greek name, Karkínos, means the same. Its glyph is ♋︎. The crab is the usual image, especially in Mediterranean and Western European art, though some depictions use a lobster or crayfish; the Swedish name, kräftan, means crayfish. In ancient Egypt the sign was pictured as a scarab beetle and in Mesopotamia as a turtle, each seen pushing the Sun across the sky to begin the summer solstice.

In Greek myth, the crab Karkinos was crushed under the foot of Heracles, and Hera placed its remains in the sky. Roman versions give the role to Juno, Hera's counterpart, and one retelling adds that the crab had pinched the hero's toes while he fought the Hydra in the Marsh of Lerna.

Cancer the zodiac sign is not the same thing as the constellation Cancer. The sign is an exact 30° slice of the ecliptic, from 90° to 120°, counted from the March equinox; the constellation is a group of stars with uneven borders. Each sign was named after a constellation the Sun passed through, but the two no longer line up. Hipparchus is credited with discovering precession of the equinoxes around 130 BC, and because of it the tropical signs Astrolivo uses drift away from the constellations, and from the sidereal zodiac that follows them, by about 1.4° per century.

In love and friendship, the tradition reads Moon-ruled Cardinal Water as steady rather than showy. Affection shows in routines: remembering how someone takes their coffee, keeping a standing Sunday call, staying close through a hard month. Compatibility in the tradition starts with elements, and it promises nothing: Cancer shares Water with Scorpio and Pisces, and its receptive polarity with the Earth signs Taurus, Virgo and Capricorn.

At work, Cardinal Water is linked with taking charge of the people side of a job: showing the new hire around, noticing when a team is running on empty. Steady colleagues and clear responsibilities suit that picture; constant reshuffles and cutthroat competition are read as harder going.

A Cancer star sign simply means the Sun was in Cancer on the day you were born. For most birthdays the date alone settles your Sun sign; on the June and July change days described under Cancer dates, birth time and place decide it. Even so, the Sun is one placement among many. The birth-chart method born in Hellenistic times, horoscopic astrology, also weighs the Moon, the planets, the twelve houses and the Ascendant.

The Moon in Cancer is another placement altogether, the one astrologers consult about emotional needs; the tradition considers the Moon strong there because it rules the sign. The rising sign, also called the Ascendant, depends on birth time: it is the ecliptic degree that was rising as you were born. Picture an example chart with a Cancer Sun, an Aries Moon and Virgo rising. Here a caretaking Water Sun sits alongside a Fire Moon that reacts fast and a Mutable Earth Ascendant, and the reading comes from how the three combine. The free birth chart shows your own three together once you add birth date, time and city, without creating an account.

Cancer sits between Gemini, the Mutable Air sign ruled by Mercury, and Leo, the Fixed Fire sign ruled by the Sun. To compare Cancer with the rest, open all zodiac signs.

FAQ

When is Cancer season? In the tropical zodiac, roughly June 20 to July 22, US Eastern Time. The Sun entered Cancer on June 20 in 2025 (already June 21 in UTC) and on June 21 in 2026, and it enters on June 21 in 2027. The Cancer dates section lists the hour and minute for each year.

What planet rules Cancer? The Moon. Classical and modern astrologers agree on this one, and the tradition also places Jupiter's exaltation in Cancer.

What element is Cancer? Water. Cancer is the Cardinal member of the Water triplicity, with Scorpio and Pisces, and shares its Cardinal modality with Aries, Libra and Capricorn.

How this page was made

Prepared by the Astrolivo editorial team from five Wikipedia articles (Cancer (astrology), Astrological sign, Planets in astrology, Zodiac, Astrology and science) and NASA JPL Horizons ephemeris data for the moments the Sun enters Cancer, then fact-checked against them. Descriptions of the sign reflect how the astrological tradition reads it.