Gemini
May 21 – Jun 20
About this sign
Ruled by quick-silver Mercury, Gemini is the zodiac's great communicator, forever gathering ideas, stories and connections wherever you go. Your mind is fast, flexible and endlessly curious, able to hold two opposing views at once and find them both fascinating. You charm people with your wit and adapt effortlessly to new company, new subjects and new surroundings, making you wonderful company and a natural at any work that involves words and ideas.
That same mental quickness can leave you restless and easily bored when a task drags on. You may start many things and finish few, and decisions can feel agonising when every option intrigues you. Your growth lies in focus: choosing a direction and staying long enough to go deep. When you channel your brilliant versatility instead of scattering it, you become not just clever but genuinely wise.
Strengths
Challenges
How Gemini works
Air is the element of relation. Air signs think in connections between things rather than in the things themselves, which makes them quick, sociable and prone to treating a well-argued idea as though it were already a decision. Mutable signs close each season and carry its transition. They adapt easily, read situations quickly, and can spend a long time keeping options open rather than choosing one. Put those together and Gemini is the mutable face of air — the specific combination only one sign in the zodiac has.
Gemini is ruled by Mercury, which is the body to watch if you want to know how a Gemini is doing. When Mercury is well placed, the sign's better qualities are easy to reach; when it is retrograde or under pressure, the same qualities turn brittle in a recognisable way.
Across the zodiac sits Sagittarius, Gemini's opposite sign. Opposites are not enemies in astrology — they are the missing half. Most of what Gemini struggles to do naturally, Sagittarius does without thinking, which is why the pairing is simultaneously the most difficult and the most instructive one on the wheel.
The three decans of Gemini
Each sign covers thirty degrees, and the three ten-degree thirds — the decans — are traditionally governed by the rulers of the three signs sharing its element. Two people born three weeks apart are both Gemini, but not quite the same Gemini. Dates are approximate and shift by about a day between years.
- 1 May 21–30 · ♊ Gemini decan, ruled by Mercury
The first decan is the purest expression of Gemini — Mercury rules it twice over, so the sign's traits arrive undiluted.
- 2 May 31 – June 9 · ♎ Libra decan, ruled by Venus
Venus adds a second flavour here: still Gemini, but with a noticeable Libra accent to how it plays out.
- 3 June 10–19 · ♒ Aquarius decan, ruled by Uranus
Uranus adds a second flavour here: still Gemini, but with a noticeable Aquarius accent to how it plays out.
Gemini compatibility at a glance
Every sign scored against Gemini on element, angle and modality. These are sun-sign scores — a starting point for a conversation, not a verdict on a particular relationship. Follow any row for the full pairing.
- Aquarius 5/5
- Aries 5/5
- Leo 5/5
- Libra 5/5
- Sagittarius 5/5
- Gemini 4/5
- Cancer 2/5
- Capricorn 2/5
- Pisces 2/5
- Scorpio 2/5
- Taurus 2/5
- Virgo 1/5
Gemini questions
What are the Gemini dates?
Gemini runs from May 21 to June 20. The exact boundary shifts by up to a day between years, because the Sun does not enter a sign at the same clock time every year — if you were born within a day of either end, a birth chart is the only way to be certain.
Who is Gemini most compatible with?
On sun-sign scoring alone, Aquarius comes out highest, and the rest of the ranking is on this page. That said, a sun-sign score compares two twelfths of the population; it describes a tendency, not a verdict on a particular relationship.
Which sign is hardest for Gemini?
Virgo scores lowest here, mostly because of the element mismatch and the angle between the two signs. Difficult pairings are not doomed ones — they simply need the differences named out loud rather than assumed away.
What planet rules Gemini?
Mercury. In practice that means its movements — the sign it is in, and whether it is retrograde — track the periods when a Gemini feels most and least like themselves.