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 Aries
01You go first
You're the one who texts the group “ok who's in” and is already putting your shoes on before anyone answers. You order the dish nobody can pronounce and try the haircut your friends are still screenshotting. If nobody's on the dance floor yet, you're out there by the second song.
The astrologyAries is a cardinal sign, the kind astrologers say starts things. With Mars ruling both the sign and the decan, starting comes naturally to you.
02You say it to their face
You'd rather have the awkward talk today than smile through it for a month. When a friend asks if the outfit works, you tell them, and they keep asking you because of it. Your fights are loud and short, and an hour later you're sending memes again.
The astrologyIn astrology Mars is the planet of courage and conflict. A double dose makes it hard for you to sit on something that bugs you.
03You lose interest once it's easy
You've had five hobbies since January, and each one came with new gear. Waiting on a reply, a delivery or a slow line makes you twitchy. But hand this decan a deadline or a rival and you'll finish in a weekend what other people plan for months.
The astrologyAstrologers link the fire signs with enthusiasm that burns hot and fast. With Mars doubled, you run best on a fresh challenge.
Why you’re like this
How Aries’ 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.
Aries is a fire 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 Aries itself, so you get a double dose of Mars, the ruler of Aries. Mars is about courage, speed and going first. In this decan it runs the show twice.
Love
The double Aries in love
You know within a few minutes whether you like someone, and you're often the one who makes the first move. Waiting three hours to text back so you seem less interested feels pointless to you, so you just reply.
You want someone who can keep up and doesn't take a little teasing personally. The right person races you to the car and can say “I'm annoyed” without going silent for two days.
If you love one
Give them a straight answer. A double Aries gets over a blunt no fast, and a maybe that drags on for weeks wears them out.
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 your best work at the start of things, when nobody knows the answer yet and someone has to try first. You'd rather learn by doing than sit through a long training. Astrologers often match this decan with sports, emergency work, starting a business, sales, the military and fitness coaching.
The hard part
When it gets heavy
Speed can turn into snapping. You might send the angry text before you've read the whole message, quit the group project because one person annoys you, or cut someone off because you already guessed the ending.
Before you send anything heated, give it ten minutes and a glass of water. Your first instinct is often right, and those ten minutes let you say it in a way people can hear.
Famous faces
Born in this decan
- Lady GagaMar 28, 1986
- Reese WitherspoonMar 22, 1976
- Keira KnightleyMar 26, 1985
- Elton JohnMar 25, 1947
- Aretha FranklinMar 25, 1942
- Quentin TarantinoMar 27, 1963
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 Aries decans
Which Aries are you?
More Aries: Aries this month · Aries compatibility · Aries Sun with every Moon · Aries rising
Your questions
Frequently asked questions
What dates are Aries decan 1?
In most years, March 21 to 30. The Sun enters Aries on March 19, 20 or 21 depending on the year and time zone, and moves on to decan 2 on March 29, 30 or 31, or April 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 March 19, 20 or 21. Am I an Aries?
Maybe. The Sun enters Aries on March 19, 20 or 21, 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.
Is Aries ruled by Mars?
Yes. Mars is the ruler of Aries in both traditional and modern astrology. In the first decan, Mars rules the sign and the decan, which is why the double Aries is described as the most Mars-driven of the three.
Do decans work for my rising sign or Moon too?
Yes. Any planet or point in Aries has a decan, set by its degree. An Aries rising at 15°, for example, is in the Leo 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 Aries goes Aries, Leo, Sagittarius. Older Hellenistic astrology used a different set called the Chaldean faces, which gives Aries’ thirds to Mars, the Sun and Venus. 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.