Born Apr 10 – Apr 19
Aries · third decan · The crusader who overshoots the mark
Your decan
The third decan of Aries is where Mars meets Jupiter — and suddenly the charge has a cause behind it. You're still the one kicking the door in, but now there's a speech prepared and a vision attached. Of the three Aries decans, you're the most expansive, the most convinced you're right, and the most likely to actually follow through — when the idea is big enough to hold your attention.
What sets your third apart
Jupiter, by way of Sagittarius, turns Aries' raw aggression into something that needs to mean something. You don't just want to win; you want to win for a reason, and you'll sell that reason loudly to anyone standing near. The gift is genuine boldness and scope — you think bigger than the other two decans and can carry people with you. The risk is that Jupiter inflates everything: the mission becomes a crusade, confidence becomes certainty, and the first sign of pushback gets treated as persecution rather than feedback.
Your gift
Visionary courage — you charge in with conviction and can actually inspire people to follow.
Your watch-out
Jupiter turns your gut feelings into gospel; you confuse being sure with being right.
The exact degrees, and who rules them
A decan is a third of a sign: ten degrees of zodiac, not a mood. Yours is Aries 20°00′ to 29°59′ — the third ten degrees the Sun crosses on its way through Aries, roughly Apr 10 – Apr 19 in most years. Sun-sign dates shift by up to a day between years because the tropical year is not a whole number of days, so if you were born within about 24 hours of either end, run the actual chart rather than trusting a date table.
| Tradition | Ruler | What it governs |
|---|---|---|
| Sign ruler (all three decans) | Mars | The baseline Aries everyone shares |
| Chaldean face | Venus | attraction, values and ease |
| Triplicity decanate | Jupiter | growth, meaning and excess |
The two systems disagree, which is normal and worth knowing: the Chaldean faces run the seven classical planets in speed order straight through all 36 decans without regard to sign boundaries, while the triplicity decanates give the first third of every sign to its own ruler and then step through the other signs of the same element. Most popular astrology quotes the triplicity ruler (Jupiter) without saying so; the older Aries face here is Venus.
Read either way, the point is the same: scale — this third overshoots where the rest of the sign would stop.
How it actually shows up
The decan is a modifier, not a second sign. It shifts emphasis inside Aries rather than replacing it — so everything true of Aries is still true of you, with growth, meaning and excess turned up. Three places people notice it:
- Under pressure. A Aries sun typically escalates — volume up, patience gone. In this third that reaction takes its colour from Jupiter — growth, meaning and excess is what the reaction ends up being about.
- In how you start things. The third decan sits at the end of the sign, already leaning toward what comes next.
- Next to the other two. Compare it directly: the first decan (Mar 21 – Mar 30) runs on Mars, and the second decan (Mar 31 – Apr 9) runs on Sun. Same sign, three noticeably different settings.
What it is not: a personality test, and not something to weigh against your Moon or rising, both of which say considerably more about you than a third of your sun sign does. The big three is where to look next.
Your decan is a hint. Your chart is the answer.
The decan refines your sun sign — but your moon, rising and every planet are where the real story lives. Run your full birth chart, free.
Degree ranges are exact by definition (each decan is ten degrees of zodiac); the calendar dates shift by up to a day between years. Rulerships are the classical Chaldean face and triplicity decanate assignments, both stated above. Written and reviewed by the Zodiux editorial team · Last reviewed · How Zodiux computes your chart · Editorial standards · For reflection and entertainment, not advice.