On 19 March the Sun and the Moon sit at the same degree of Aries. It is a new Moon, so there is nothing to see in the sky: the Moon rises and sets with the Sun, and its lit face is turned the other way. This is the dark point of the cycle, where one round ends and another begins.
This one is also the first new Moon after the equinox, the first of the zodiacal year. If your January resolutions never quite feel in step with you, this is the new year the sky actually keeps.
What is happening
A new Moon is a conjunction between the Sun and the Moon. In a birth chart, the same configuration describes someone whose wants and needs pull in one direction: a lot of force, very little distance from yourself. In the sky of a single day it works the same way, for everybody and for a few hours: intention and instinct point at the same spot, and here that spot is Aries.
Aries is cardinal Fire, ruled by Mars. It is not the sign that refines things, it is the one that starts them. It does not ask you for a detailed plan, it asks you for the first step, and in exchange it hands you a push you will not find as easily in the weeks that follow.
How to use it
The useful thing to do under a new Moon in Aries is to pick one thing. This sign is not good at carrying five fronts at once: when it opens them all together, it drops them all together. Take the project, the conversation or the habit you have been putting off for months, and start with one small concrete move, today or within the next three days.
It is worth knowing where you will trip, too. Under this energy your reactions get fast and blunt, and the urge to set off usually arrives before the information you need. If you catch yourself snapping back an answer in these hours, keep in mind that it is almost never a decision, it is the push talking for you. Waiting half a day switches nothing off and saves you from having to patch things up.
There is a second delicate point, and it concerns other people. Aries looks at the world from its own vantage point, and on a day like this it is easy to settle a matter without noticing who else is in it. Before you set off, ask the people it touches.
Where you feel it most
The effect is not the same for everyone. If your Sun, Moon or Ascendant is in Aries, or in one of the other cardinal signs (Cancer, Libra, Capricorn), you feel it directly and personally. For everyone else, the thing to look at is which house of your birth chart this new Moon falls in: that is where the cycle restarts. If it lands in the house of work, work restarts. If it lands in the house of relationships, a relationship does.
That is the kind of detail you can only see on your own chart, never on your Sun sign alone. If you have not calculated it yet, you need your date, time and place of birth, and it takes a minute.
Over the following days the Moon pulls away from the Sun and comes back as a thin crescent in the west, just after sunset. That is your signal that whatever you started has stopped being an intention and has begun to take shape.