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♊ Gemini
May 21 – Jun 20
Air · Mutable
Ruler: Mercury
Gemini is an air sign ruled by Mercury, symbolizing intellect, communication, and versatility. It delights in new information and people.
Personality
Articulate, quick to adapt, and endlessly curious—though their attention scatters easily and they can seem fickle.
Strengths
Communication
Wit
Adaptability
Fast learning
Weaknesses
Fickleness
Lack of focus
Lack of depth
Love
Gemini is drawn to someone they can talk with. They can't bear boredom, so relationships that share fresh stimulation last longest.
Career & Aptitude
Gemini fits fields built on communication, information, and variety—media, marketing, sales, education, and writing.
Gemini decans — three divisions within one sign
A sign spans thirty degrees, so the Sun sits nearly twenty degrees apart at the start and the end of the same sign. Classical astrology split that span into three ten-degree decans and assigned each one a different ruler drawn from the same element.
Decan 1
0°~10°
5.21~5.31
Sub-ruler: Mercury
Mercury doubled pushes curiosity and verbal speed to their limit. Learning is quick and conversation never runs dry. Attention travels easily, so deliberately arranging one subject to be followed to its end keeps the gift from thinning out.
Decan 2
10°~20°
6.1~6.10
Sub-ruler: Venus
Venus warms the speech. Wit lands softly rather than sharply, and people relax in its company. The cost is that keeping a relationship smooth can postpone the thing this decan actually wanted to say.
Decan 3
20°~30°
6.11~6.20
Sub-ruler: Uranus
Uranus sends the thinking sideways. This decan finds the angle nobody else was looking from and questions the rule rather than the answer. Being understood can take a while, so spending extra words on the explanation turns out to be the faster route.
Gemini compatibility — the other eleven signs
The elements (fire, earth, air, water) set the baseline, but even within one element the cardinal, fixed and mutable qualities change the texture. Each pairing below is read on its own terms.
Libra
Strong match
Gemini and Libra keep an active exchange going. Never dull, and constantly giving each other something to think about.
Gemini × Libra in detail →Aquarius
Strong match
Gemini and Aquarius trade ideas easily. Respect how the other thinks and an unusual bond forms.
Gemini × Aquarius in detail →Aries
Balanced match
Aries and Gemini: fire and air feed each other. Conversation multiplies and new ideas grow between you.
Gemini × Aries in detail →Leo
Balanced match
Gemini and Leo: plenty of talk and expression. Acknowledge each other's gifts and the synergy shows.
Gemini × Leo in detail →Sagittarius
Balanced match
Gemini and Sagittarius sit opposite each other in the zodiac and hold what the other lacks — Gemini sees the information, Sagittarius the meaning. Learn together and it runs well.
Gemini × Sagittarius in detail →Taurus
Contrasting match
Taurus and Gemini: stability against change. Respect each other's tempo and settle anything important in words.
Gemini × Taurus in detail →Cancer
Contrasting match
Gemini and Cancer: the head and the heart move differently. Listen to what Cancer feels and the distance closes quickly.
Gemini × Cancer in detail →Virgo
Contrasting match
Gemini and Virgo are both ruled by Mercury but point opposite ways — Gemini widens, Virgo tidies. Split the roles and you become a strong team.
Gemini × Virgo in detail →Scorpio
Contrasting match
Gemini and Scorpio: lightness against depth. When Scorpio takes a Gemini joke seriously it misfires, so matching tone matters.
Gemini × Scorpio in detail →Capricorn
Contrasting match
Gemini and Capricorn: improvisation against planning. Let Capricorn set the frame and Gemini fill it freely, and the friction drops.
Gemini × Capricorn in detail →Pisces
Contrasting match
Gemini and Pisces: reasoning against intuition. When words fail, spending time together does the work instead.
Gemini × Pisces in detail →When Mercury goes retrograde in Gemini
Mercury's home turf — confusion in speech, texts and contracts peaks. Put all communication in writing.
Dates
Retrograde calendar and my house2028 May 21 to Jun 14
The following draws on mythology and observational astronomy, separate from the personality reading above.
Myth and origin
Castor and Pollux shared a mother, but Pollux was the son of Zeus and immortal while Castor was mortal. When Castor died, Pollux found an endless life alone unbearable and asked to divide his immortality. Zeus agreed and set the pair in the sky together. The story is about a bond that could not be severed — not about a divided nature.
Finding it in the night sky
Two bright stars side by side make this one of the easiest constellations for a beginner. Pollux, labelled beta, actually outshines alpha Castor, an unusual case of the lettering not matching the brightness order. Look up and to the left of Orion from winter into spring.
A common misconception
Calling Gemini two-faced is an association drawn from the name, and it contradicts the myth outright. Astronomy supplies a twist of its own: Castor looks like a single point to the eye but is a system of six stars bound together by gravity. It genuinely is more than one — for reasons that have nothing to do with personality.
See more with your birth chartZodiac readings reflect general tendencies based on your Sun sign; for a precise analysis, your full birth chart (Sun, Moon, Rising) should be considered together.
Exactly when Gemini begins and ends
Gemini period (KST)
| Year | Begins | Ends |
|---|---|---|
| 2025 | May 21, 03:55 | Jun 21, 11:42 |
| 2026 | May 21, 09:37 | Jun 21, 17:25 |
| 2027 | May 21, 15:18 | Jun 21, 23:11 |
Ingress times are computed with the Swiss Ephemeris. Gemini begins the instant the Sun reaches 60° of ecliptic longitude.
Born on the cusp?
In 2026, Gemini runs from May 21, 09:37 to Jun 21, 17:25. Anyone born before that opening moment belongs to the previous sign, Taurus; anyone born after it is Gemini. If your birthday falls on a boundary date, you need your time of birth to settle it.
Gemini begins at the same moment as Grain Buds in the 24 solar terms, and ends at Summer Solstice.
Frequently Asked Questions
Articulate, quick to adapt, and endlessly curious—though their attention scatters easily and they can seem fickle. Key strengths: Communication, Wit, Adaptability, Fast learning.
Gemini is most compatible with Libra, Aquarius.
Gemini is drawn to someone they can talk with. They can't bear boredom, so relationships that share fresh stimulation last longest.
Gemini fits fields built on communication, information, and variety—media, marketing, sales, education, and writing.
Castor and Pollux shared a mother, but Pollux was the son of Zeus and immortal while Castor was mortal. When Castor died, Pollux found an endless life alone unbearable and asked to divide his immortality. Zeus agreed and set the pair in the sky together. The story is about a bond that could not be severed — not about a divided nature.
Two bright stars side by side make this one of the easiest constellations for a beginner. Pollux, labelled beta, actually outshines alpha Castor, an unusual case of the lettering not matching the brightness order. Look up and to the left of Orion from winter into spring.