May 21 – June 20
Western (tropical) Sun sign · dates are approximate and can shift by a day each year
Gemini is a Sun sign in the tropical (Western) zodiac: if the Sun was between 60° and 90° of ecliptic longitude, measured from the March equinox, when you were born, your Western Sun sign is Gemini. That is a calculation, and it can be checked. In 2026 the Sun entered tropical Gemini on 21 May at 06:07 IST. Between 2020 and 2030 that entry falls on 20 or 21 May in IST, which is why birth time matters for people born on a cusp day.
Vedic astrology uses the sidereal zodiac, measured against the stars. It subtracts the Lahiri ayanamsa (about 24.2° in 2026), so the Sun reaches sidereal Mithuna (Gemini) roughly 25 days later (in 2026, on 15 June).
Worked example
Born at 12:00 noon IST on 26 May 2026:
Same sky, two zodiacs, two labels. Both numbers come from this site's own astronomy code.
Someone's "sign" can mean three different things, and they change at very different speeds:
Key Traits
Gemini is the zodiac's communicator — quick, curious, and endlessly interested in ideas and people. Ruled by Mercury, you move fast, think faster, and light up any room you enter.
A full birth chart calculates your Moon sign, rising sign and every planetary placement from your birth date, time and place. The calculation is exact; what each placement means is traditional interpretation.
Get Your Free Birth Chart ReadingTraditionally Paired Signs
These pairings come from element and tradition; they are not a prediction about any relationship.
The dates and degrees above are measurements. The sections below are not: they describe how Western astrologers have traditionally interpreted the Sun in Gemini. There is no scientific evidence that Sun signs predict personality, so read them for reflection and cultural interest, not as a basis for life decisions.
Castor and Pollux were twins with one crucial difference: Pollux was the son of Zeus and immortal, Castor was mortal and would die like anyone else. When Castor was killed, Pollux begged his father to let him share his own immortality rather than live forever without his brother — and Zeus obliged by letting them split their time, half in the underworld, half among the gods, forever alternating. That's the real shape of Gemini, closer than the pop-astrology cliché of a fickle two-faced flirt: two genuinely different modes of being, sharing one nervous system, neither one willing to disappear for the sake of the other. When people say Gemini is 'two people,' they're not wrong — they're just usually wrong about why.
Ruled by Mercury, you process language the way most people process breathing — automatically, constantly, without much friction. This shows up as wit, but the wit is downstream of something less flashy: an actual hunger to understand how things connect. A Gemini in a room will ask the question nobody else thought to ask, not to perform cleverness but because the gap in the conversation was audibly bothering them. You hold contradictory opinions comfortably, which reads as inconsistency to people who need certainty and reads as intellectual honesty to everyone else.
This is arguably where Gemini does its best work — better, often, than in romance, where the stakes make you skittish. A Gemini friend remembers the strange detail from a conversation eight months ago, texts you the article that made them think of you at 1 a.m., and is the person who can talk you through a crisis and then, twenty minutes later, make you laugh about it. You are a low-maintenance friend to have and a high-maintenance one to keep close, because your attention genuinely does move — the friendship that survives with a Gemini is the one that doesn't demand constant proof of priority, just periodic, genuine reconnection.
Boredom, not commitment, is the real threat to a relationship with you. You don't need drama, but you do need a partner whose mind keeps surprising you, because a relationship that's gone fully predictable starts to feel, to you, like a locked room. Libra and Aquarius meet you in the world of ideas without demanding you slow down; Aries supplies exactly enough friction to keep things interesting. What partners misread as detachment is often just you thinking out loud in real time — the fix isn't asking Gemini to feel less, it's asking them to narrate the feeling instead of analysing it into the distance.
You were built for whatever job description includes the phrase 'no two days are the same.' Writing, journalism, sales, teaching, tech, and anything requiring you to translate a complicated idea for people who don't have your vocabulary — these are where you're genuinely, not just superficially, gifted. Repetitive work doesn't just bore you, it measurably degrades your output, so the career move that actually works is choosing variety over prestige. Money is similarly restless in your hands: brilliant at generating it through ideas and connections, indifferent to tracking it. An automated savings structure is less a financial tool for you than a mercy.
The twin who gets ignored, in the version of you that isn't working, is the one who has to sit still and finish something. Scattered attention curdles into unreliability; wit becomes a way of dodging a question you don't want to actually answer. There's a real tendency to intellectualise a feeling until it's safely at arm's length, which people close to you experience as being talked at rather than felt with. The growth isn't becoming a different person — it's letting one of your two selves actually stay in the room long enough to be known completely, instead of tagging out the moment things get emotionally specific.
Strengths: Curiosity, wit, communicative brilliance, adaptability, social ease, the ability to see multiple perspectives simultaneously, and a gift for making complex ideas accessible. Challenges: Inconsistency, scattered energy, difficulty committing to one path when all paths look interesting, and a tendency to intellectualise emotions rather than feel them.
In the tropical (Western) zodiac, roughly May 21 – June 20. The exact start day depends on the year and time zone: between 2020 and 2030 it falls on 20 or 21 May in IST. If you were born on a cusp day, check your birth time.
Vedic astrology uses the sidereal zodiac, which now sits about 24.2° behind the tropical one. So most people's Vedic Sun sign is the sign before their Western Sun sign. In India, "rashi" also usually means the Moon sign, which is a completely different calculation from the Sun sign.
The sign itself is a calculation, and it is accurate if your birth date (and, on cusp days, birth time) is right. The personality descriptions are traditional interpretation and are not scientifically validated.
Sun positions: the astronomy-engine ephemeris library. Sidereal positions: Lahiri (Chitrapaksha) ayanamsa. The full method is on our Methodology page and references are on the Sources page.
Written and edited by Amritanshu Kumar Gaurav, AstroMystra's founder and a software developer. See our editorial policy.