The third sign of the zodiac, usually dated May 21 to June 20: a mutable air sign ruled by Mercury, the Twins, read as curious, talkative and quick to change direction.
Gemini at a glance
Gemini, the third sign, closes the spring quarter of the zodiac. It is an air sign, alongside Libra and Aquarius, and a mutable sign, one of the four at the turn of each season, when one season gives way to the next. Mercury rules it, the planet of the mind and of messages, and its symbol is the Twins, Castor and Pollux of Greek myth, whose names two bright stars of the constellation still carry. Its polarity is the active one. The tradition gives Gemini the arms, hands and lungs, the parts we use to reach out and to speak. Its opposite is Sagittarius, and the two form the axis of learning: facts and conversation on the Gemini side, meaning and faith on the Sagittarius side.
The Gemini character
The tradition reads Gemini as the sign of the question. Air makes it mental rather than physical, Mercury makes it quick and verbal, and the mutable mode makes it flexible. A Gemini is described as curious about almost everything, sociable, funny and fond of news, gossip and ideas, the person who knows a little about a great deal and can talk to anyone. Its restlessness is the other side of that gift: boredom comes fast, attention scatters and commitments can be hard to keep when something new appears. Astrologers often say the Gemini lesson is depth, choosing a few things to go all the way with instead of sampling everything.
Gemini in love
In love Gemini is read as needing conversation above all. Wit and shared interests win it over faster than grand gestures, and a partner who is fun to talk to at breakfast matters more than one who is merely beautiful. The air signs Libra and Aquarius are its natural companions, and the fire signs Aries and Leo its friendliest, bringing energy to its ideas. Sagittarius, the opposite sign, is read as a lively and restless match of two curious minds. Virgo and Pisces square Gemini, which the tradition reads as friction between its lightness and their seriousness or depth. A comparison of two whole charts says far more than two Sun signs ever can.
Gemini at work
Anything with words, people and variety suits the tradition's Gemini: writing, journalism, teaching, sales, marketing, media, translation, trading and any job with a lot of contact and movement. It is read as quick to learn and quick to adapt, good at several things at once and at connecting people who ought to meet. Routine without variety is its difficulty. Astrologers often suggest that a Gemini needs either a job that changes every day or two jobs rather than one, and that its best work comes when curiosity and a deadline arrive together.
Gemini beyond the Sun sign
A planet in Gemini is read as working through the mind and through words. Gemini rising gives a lively, youthful manner and a lot of talk; the Moon in Gemini a need to talk feelings through; Mercury in Gemini, Mercury in its own sign, a fast, versatile mind; and Venus in Gemini a love of flirting and conversation. The birth chart calculator shows your whole chart. The sections below give the Gemini dates for the coming years, its compatibility with every sign, its three decans and the slow planets' stays in it.
Gemini season dates
Gemini season is the part of the year when the Sun is in Gemini, and anyone born in it is a Gemini. By the US Eastern calendar it began on May 20 or 21 in the years 1950 to 2049, and ended between June 20 and June 22, when the Sun moved on into Cancer: the dates shift by a day with the leap-year cycle and the time zone. Times are US Eastern, to the minute; almanacs can differ by a minute.
How Gemini relates to each sign by the traditional rule: signs of the same element (four apart) and of friendly elements (two apart) are read as easy, squares and quincunxes as friction, neighbors and opposites as mixed. A whole chart says far more than two Sun signs.
All four popular lists we compared give Gemini yellow. William Lilly gave Gemini “white mixed with red” in 1647, and its traditional ruler, Mercury, “sky colour or bluish”.
Each sign splits into three decans of ten degrees, about ten days of the Sun's stay. The modern system gives each decan a sign of the same element; the older one gives it a planet in the Chaldean order, and the Golden Dawn a tarot card.
When Jupiter, Saturn and the outer planets pass through Gemini: everyone born in those years shares that placement, with its retrograde loops counted as one stay.
Jupiter next in Gemini 2036 to 2037Last there 2024 to 2025.
Saturn next in Gemini 2030 to 2032Last there 2000 to 2003.
In 2026 the Sun stands in front of the constellation Gemini from Jun 21, 2026 to Jul 20, 2026, about a month later than the sign's dates: the signs are measured from the equinox, which has drifted west against the stars since the zodiac was named.
Gemini is usually dated May 21 to June 20, the part of the year called Gemini season. From 1950 to 2049 the Sun entered Gemini on May 20 or May 21 by the US Eastern calendar, and left on June 20, 21 or 22, so birthdays near either end are worth checking to the minute.
What is Gemini's element and ruling planet?
Gemini is an air sign of the mutable mode, ruled by Mercury. Air is read as thought and communication, the mutable mode as adaptability, and Mercury as the mind, speech and travel, which together give Gemini its reputation for curiosity and wit.
Which signs are most compatible with Gemini?
By the traditional rule, Libra and Aquarius, the other air signs, and Aries and Leo, in the friendly element of fire. Sagittarius, the opposite sign, is read as a lively pairing of two restless, curious signs.
Why is Gemini called two-faced?
Its symbol is the Twins, and astrologers read the sign as holding two views at once and changing its mind as new information arrives. At its best that is open-mindedness and versatility; the unkind reading, two-faced, is the same trait seen as inconsistency.