The year begins here
An is the moment a planet crosses from one sign into the next — a shift in condition that the sky marks with precision. The Sun makes twelve of them each year, spending approximately thirty days in each sign. When it crosses the zero-degree boundary into Aries, it does so at the spring equinox: the precise moment when day and night are equal and the northern hemisphere tilts back toward the Sun. This is also the first day of the astrological year — the same event, named two ways.
The ingress falls annually around March 20–21. From this point the Sun will move through all twelve signs before returning to Aries, which is why this crossing carries more calendar weight than any of the other eleven: it is the reset.
The Sun in its exaltation
is the traditional measure of how well-placed a planet is in a given sign. The highest two grades are domicile (the sign a planet rules and is most at home in) and exaltation (the sign where a planet is honored and operates at its most effective). The Sun holds its exaltation in Aries.
Of the twelve signs, Aries is the one where solar vitality, will, and clarity of purpose are at their peak — the Sun is not merely passing through; it is, by the tradition's reckoning, being celebrated. Classical sources describe exaltation as the condition of a guest held in high honor: welcomed, operating at full strength, expressing best qualities without strain.
This distinguishes the Aries solar season from every other. The same Sun that is in fall in Libra and in detriment in Aquarius arrives in Aries at the top of its dignity scale. Directed will, ambition, and the impulse to act carry extra solar force for this thirty-day window.
The sign's character
Aries is cardinal fire — for its orientation toward drive, energy, and the animating impulse to move; because it opens a season rather than sustaining or completing one. Cardinal signs strike when the moment appears and then move forward.
The planet that rules Aries is Mars — the body of action, conflict, and appetite for engagement. For this month, the Sun's will must express through Mars's conditions: directness, velocity, the demand for immediate forward motion. The Sun in Aries has little patience with prolonged deliberation. The season rewards the first move over the perfectly prepared one.
Where it shows up
The domains most associated with this pairing are visible in ordinary experience: new ventures, physical energy, competitive situations, and initiatives that have been deferred. The traditional correspondence between Aries and the first house — the house of self, body, and direct presence in the chart — reinforces the theme of emergence: what has been latent begins to push outward.
In practice, this season tends to surface the impulses that lay dormant through Pisces, the closing sign that precedes it. What was intuited or imagined in Pisces wants to become action. The Sun's exaltation provides the solar voltage; Mars's rulership provides the direction.
The limit built into the season
Cardinal signs open; they do not finish. The power of Aries season is initiation, not completion — and this is also where it can mislead. Multiple starts without follow-through are as available as decisive action. The Sun at exaltation can amplify the sense of one's own momentum past what the situation supports; Mars's influence brings courage but also impatience.
The useful orientation is to notice which impulse is genuinely new — worth beginning now — versus which is familiar restlessness dressed as initiative. The spring equinox marks the start of a cycle that has thirty days in Aries alone, and then eleven more signs to develop whatever is set in motion here.