Born near a cutoff?
Check your decan
The dates move by about a day depending on the year you were born. Enter your birthday and we’ll work out where the Sun was.
What gives you away
Three signs you’re the double Gemini
01You can talk to anyone
You start chatting with the person behind you in a coffee line and leave knowing where they grew up. When three friends text you at once, you answer all of them in one message. Put you at a wedding where you know nobody and you'll have a new contact saved by the end of the night.
The astrologyMercury rules both the sign and the decan here, and astrologers call it the planet of conversation. With a double dose, talking to strangers feels easy to you.
02You know a little about everything
You've got forty tabs open and a different hobby every few months. You fell into a video about deep-sea fish at 1 a.m. and brought it up at lunch the next day. People text you when they need a fact, a recommendation or a fun way to kill an hour.
The astrologyIn astrology Mercury is the planet of learning and collecting information. With a double dose, you keep collecting questions long after other people have stopped asking.
03You let yourself change your mind
You can love a show in episode two and be done with it by episode five. You switch your weekend plan when a better idea comes up, and you're fine with it. Friends who knew you two years ago say you're a different person, and you take it as a compliment.
The astrologyGemini is a mutable sign, the kind astrologers link with change and adapting. Mercury adds a mind that keeps moving, so updating your opinion feels natural to you.
Why you’re like this
How Gemini’s decans work
Each zodiac sign covers 30 degrees of the sky. Astrologers split every sign into three 10-degree slices called decans, and the Sun spends about ten days in each one.
Gemini is an air sign. In the decan system most popular in modern astrology, each third of a sign mixes in a sign of the same element, in order. The first third mixes in Gemini itself, so Mercury, Gemini's ruler, gets a double say. In astrology Mercury is the planet of talking, learning and quick thinking, and here it runs the whole show.
Love
The double Gemini in love
You flirt with words. You might text someone for weeks before a first date, and a good voice note can win you over faster than flowers. The person who makes you laugh in the first five minutes already has a head start.
You need someone who keeps you curious. Boredom kills a crush for you faster than a fight does. You also want a partner who follows your tangents and throws one back, instead of asking what your point was.
If you love one
Send the random link back with your own take on it. To a double Gemini, a good back-and-forth counts as a date.
Birth Chart Reading
Your decan is one slice of you. Read the rest.
Your Sun is one planet. The Birth Chart Reading covers your whole chart in 35+ pages, written for your exact birth time and place.
- Your Sun’s exact degree and decan, with your Moon and rising
- How you love, from your Venus and Mars
- Work, friends, family, and the year ahead for you
- Prepared for your chart alone, reviewed by our team, emailed as a PDF within 12 hours
$44.99, one time
Get my birth chart reading →Work
At work
You do best when the day has variety and lots of people to talk to. Stuck on the same task for eight hours, you'll invent a side project by noon. Astrologers often match this decan with writing, journalism, social media, sales, teaching, podcasting and languages.
The hard part
When it gets heavy
With so many interests, a lot stays half done. The drafts folder is full, the hobby gear sits in a closet, and a friend's long message gets left on read because you'll answer it properly later. Sometimes you talk before you think, and a joke lands harder than you meant.
Before you start something new, finish one small thing you already began. It can be as tiny as sending that reply.
Famous faces
Born in this decan
- Cillian MurphyMay 25, 1976
- Lauryn HillMay 26, 1975
- Stevie NicksMay 26, 1948
- Bob DylanMay 24, 1941
- Kylie MinogueMay 28, 1968
- Carey MulliganMay 28, 1985
We checked each birthday against the Swiss Ephemeris, the planet-position tables astrologers use, so everyone listed sits inside this decan whatever time they were born. Sharing a decan is a fun overlap. Your Moon, rising and the rest of your chart are still all your own.
All three Gemini decans
Which Gemini are you?
More Gemini: Gemini this month · Gemini compatibility · Gemini Sun with every Moon · Gemini rising
Your questions
Frequently asked questions
What dates are Gemini decan 1?
In most years, May 21 to 30. The Sun enters Gemini on May 20, 21 or 22 depending on the year and time zone, and moves on to decan 2 on May 30 or 31, or June 1 (we checked every year from 1940 to 2026 with the Swiss Ephemeris). Born on one of those days? Use the decan checker on this page, or your free birth chart.
I was born on May 20, 21 or 22. Am I a Gemini?
Maybe. The Sun enters Gemini on May 20, 21 or 22, depending on the year and where you were born, and the switch can land in the middle of your birthday. Put your birthday into the decan checker above. If it says your birth time decides, your free birth chart gives you the exact answer.
Which planet rules Gemini?
Mercury, in both traditional and modern astrology. Mercury also rules Virgo, but in Gemini it shows up as talk and curiosity. In decan 1 it rules the sign and the decan, which is why this third is called the double Gemini.
Do decans work for my rising sign or Moon too?
Yes. Any planet or point in Gemini has a decan, set by its degree. A Gemini rising at 15°, for example, is in the Libra decan, even if your Sun is in another sign. Your rising degree needs your exact birth time, and your free birth chart shows it.
Which decan system does ZODIA use?
The triplicity system, the most popular one in modern astrology. Each decan mixes in a sign of the same element, so Gemini goes Gemini, Libra, Aquarius. Older Hellenistic astrology used a different set called the Chaldean faces, which gives Gemini’s thirds to Jupiter, Mars and the Sun. Both are real traditions.
Is my decan my whole personality?
No. Your decan sharpens your Sun sign, and your Sun is one part of your chart. Your Moon shapes how you feel, your rising shapes how you come across, and your Venus and Mars shape how you love and go after things. Two people born on the same day can still be very different.