Aries season runs from March 21 to April 19 and opens the zodiac year: the Sun's move into Aries happens at the March equinox, the start of spring in the Northern Hemisphere. Astrologers read the month through the sign's ruler, Mars, and its element, fire, so it's associated with starting things, saying the direct thing and getting moving after winter. The equinox lands on or around March 20, so the first day of the season can shift by a day from year to year.
South of the equator, the same moment begins autumn. The sign's meaning travels; the weather tells a different story.
Why the zodiac year starts with Aries season
The zodiac most Western astrologers use, the tropical zodiac, is measured from the March equinox. The point where the Sun crosses the celestial equator heading north is called the first point of Aries, 0 degrees of the sign, and every other sign is counted off in 30-degree steps from there. That's why Aries is the first sign and why its season feels like a beginning: it's tied to a moment in the year, not to a group of stars.
The stars have drifted since the system was set up about two thousand years ago. Because of precession, the constellation behind the Sun at the March equinox is now Pisces, not Aries. Tropical astrology keeps the season as its anchor, which our guide to sidereal vs. tropical astrology explains in more detail.
Astrologers also give the Sun a special dignity here: it is exalted in Aries. Ptolemy's reasoning, in the second century, was seasonal. In Aries the Sun begins its climb toward the long days and heat of summer, so it is at its most promising. Its fall comes at the opposite point, in Libra, when the days start to shrink.
Mars and the mood of Aries season
Aries is cardinal fire. Cardinal signs open the seasons, fire signs act first and think on the way, and Mars, the ruling planet, is associated with drive, courage, competition and heat. Put together, astrologers describe Aries season as a month with a short runway. Ideas want to become actions quickly, and patience runs a little thin.
That can look like:
- Finally booking the thing you've talked about since January.
- Energy for exercise, especially anything with a stopwatch or a scoreboard.
- Conversations that get to the point faster than usual, sometimes too fast.
- A pile of enthusiastic beginnings, some of which won't survive to May.
Venus is in detriment in Aries, the traditional way of saying that romance in Mars's sign prefers the chase to the slow build. Saturn is in fall here too: Aries likes to start, and rules and long timelines aren't its natural speed. None of this makes the month reckless. It makes it a good month for the first step and a poor one for waiting until everything is perfect.
The new years that fall in Aries season
Aries season has been somebody's new year for a very long time.
Nowruz, the Persian New Year, is set by the March equinox itself, the same moment that opens Aries season. Iran's solar calendar ties each of its twelve months to a zodiac sign, and in Afghanistan the months have traditionally carried the signs' names, so the year begins with Hamal, the Ram. Our spring equinox rituals guide covers Nowruz customs, from spring cleaning to the haft-sin table.
Lady Day, March 25, was the first day of the legal year in England and Wales from the twelfth century until 1752, when the country moved New Year's Day to January 1 and adopted the Gregorian calendar. The UK tax year still begins on April 6 as a relic of that switch: the old quarter day, pushed on by the eleven days the calendar dropped, ended up in early April.
April Fools' Day, April 1, always falls inside Aries season, which suits a sign known for nerve and mischief. Easter usually does too, although in some years it slips past April 19 into Taurus season.
Six small ways to use Aries season
You don't need Aries placements to use the month. A few practical ideas:
- Start one thing, small. Pick the project that has been "next month" for a while and do the first ten minutes today.
- Move outside. Mars likes the body involved. A brisk walk, a run, a bike ride or a game in the park all count.
- Say the direct sentence. If there's a request or a "no" you've been softening for weeks, try saying it plainly and kindly.
- Clear the decks. Throw out what's broken, return what you borrowed, cancel what you never use.
- Plant something. Seeds on a windowsill are a classic equinox ritual, and they give your impatience somewhere to wait.
- Mind the fuse. A Mars month can shorten tempers. When a reply comes out hot, wait an hour before you send it.
If your birthday falls in Aries season
Happy solar return. Your birthday is the Sun coming back to the degree it held when you were born, and an Aries birthday arrives with the whole zodiac year starting around it, which makes it a natural point to set a plan. Our solar return birthday ritual walks through a simple version: look back, mark the moment, write down one thing you want to begin.
If you were born around March 20 or 21, or April 19 or 20, check a birth chart rather than a list of dates, because the boundary moves a little each year. And your Sun is only one piece of your chart. Someone with Aries rising, born with the sign on the eastern horizon, can feel this season just as strongly as an Aries Sun. For the sign itself, see Aries traits, and for the month ahead, the Aries monthly horoscope.
Questions readers ask
Is Aries season the astrological new year?
Yes, in Western tropical astrology. The zodiac is counted from the March equinox, so the Sun's entry into Aries is the start of the cycle. Many astrologers treat it as a natural time for intentions, alongside or instead of January 1.
Why is Aries the first sign if the constellation has moved?
Because the tropical zodiac is anchored to the seasons, not to the stars. The equinox point slides slowly backward through the constellations over the centuries, but the season it marks stays the same, and that season is what Aries describes.
Why does Aries season feel restless?
Astrologers put it down to cardinal fire and Mars: an urge to begin, compete and move. Spring adds its own push in the north. If the month feels scattered, pick fewer beginnings and finish one of them.
What comes after Aries season?
Taurus season, from April 20 to May 20, which slows the pace and turns beginnings into something steady. The month before Aries is Pisces season, the quiet end of the zodiac year.
