In this article
What a moon phase really is
The Moon makes no light of its own. What you see is the half of it lit by the Sun, viewed from an angle that changes night by night. When the Moon stands on the same side of Earth as the Sun, the lit half faces away from us and the Moon is dark: a new moon. When it stands on the opposite side, the lit half faces us in full: a full moon. Everything in between is a matter of angle.
So a phase is a relationship, not a property of the Moon alone. Astrologers measure it as the distance between the Sun and the Moon along the zodiac. At the new moon the two share the same degree; at the full moon they sit in opposite signs.
From one new moon to the next takes 29.50 days on average. That figure is computed from the new moons of 2027, and single cycles run a few hours longer or shorter because the Moon’s orbit is not a perfect circle.
The eight phases and what they symbolize
Most calendars name four phases. Astrology often uses eight, splitting the circle into equal slices of roughly three and a half days each. The first half of the cycle is waxing (the lit part grows), the second half is waning (it shrinks). The diagram shows the Moon at each position around Earth with sunlight coming from one side.
Read the meanings below as prompts for reflection. They are traditional images, useful for asking good questions about where you are in a project or a feeling. They are not rules about what you may or may not do on a given day.
- New moon: the dark start. A time to notice what you want to begin and to set a quiet intention, before anything is visible.
- Waxing crescent: the first sliver of light. The idea meets reality, and you gather what you need: time, information, a little courage.
- First quarter: half lit, half dark. The first push, where decisions have to be made and small obstacles show you how much you care.
- Waxing gibbous: almost full. Refining and adjusting, polishing what you started rather than starting again.
- Full moon: culmination and visibility. What was growing comes into view, and it is a natural point to review, celebrate or see clearly what is not working.
- Disseminating (waning gibbous): sharing. You pass on what you learned, talk it through, give back.
- Last quarter: release and clearing. Another half-lit Moon, this time asking what to let go of, finish or tidy away.
- Balsamic: the last thin crescent before the dark. Rest, quiet and digestion, making room for the next beginning.
The phases are prompts for reflection, not rules for the calendar.
One lunation, start to finish
The strip at the top of this article follows one real cycle of 2027, one disc per day, each drawn with the lit fraction computed for that date.
The cycle opens with the new moon of 8 March 2027 in Pisces, the last sign of the zodiac. A Pisces new moon suits endings that are also beginnings: dreams, imagination, a softer kind of starting. The first quarter follows on 15 March 2027, the point where an intention set at the dark moon meets its first test.
The full moon arrives on 22 March 2027 in Libra, with the Sun in the opposite sign. A full moon always sits on an axis, and this one stretches between self and other: the Libra Moon asks about balance and fairness in relationships while the Sun across the wheel pushes for independence. The last quarter comes on 30 March 2027, and the cycle closes with the next new moon on 6 April 2027, ready to begin again in a new sign.
New moon vs full moon: the sign sets the theme
The phase tells you when in the cycle you are. The sign tells you what the cycle is about. A new moon in a practical earth sign colours the month with work and routine, a new moon in a water sign with feelings and closeness. At a full moon, read both ends: the sign of the Moon and the sign of the Sun facing it.
If you know your birth chart, there is a third layer: the house where the lunation falls in your own chart. The same new moon lands in the house of home for one person and in the house of work for another, so the theme becomes personal. A personal horoscope does this placing for you, day by day.
Between the lunations the Moon keeps moving fast. It changes sign about every 2.3 days, which adds up to 160 sign changes in 2027. That speed is why the Moon in astrology stands for mood, needs and daily rhythms, and why your birth date alone is not always enough to know your own Moon sign. If the Moon changed sign on your birthday, the exact time decides it.
2027 at a glance
In 2027 there are 12 full moons and 13 new moons. The grid shows each month with its lunations, the day and the sign of each one, so you can see at a glance which signs the year’s new and full moons fall in.
The ringed lunations are eclipses: new or full moons that fall close to the Moon’s nodes, where the Sun, the Moon and Earth line up closely enough for a shadow to fall. Astrology treats them as amplified lunations, and they have their own guide in eclipse season. For the other cycles of the year, from these lunations to Mercury retrograde, the sky calendar puts everything on one page.
A gentle practice: the new moon and full moon journal
The simplest way to work with the Moon is to write twice a month. Over a year it gives you a record of your own rhythm that no table can provide.
On or just after the new moon, answer three questions:
- What do I want to begin or give more attention to this month?
- What would a small, realistic first step look like?
- How does the sign of this new moon colour that wish?
Around the full moon, come back to the same page:
- What has become visible since the new moon, in my plans or in my feelings?
- What am I proud of, and what is clearly not working?
- What can I let go of during the waning half of the cycle?
At the quarters you can add a single line: what needs a decision now (first quarter) and what needs clearing (last quarter). That is the whole routine. Its value comes from repetition rather than from any one entry.
Write twice a month for a year and you will know your own rhythm better than any table can show it.
Your natal moon phase
You were also born at a particular point in the cycle. Your natal phase is the angle between the Sun and the Moon in your birth chart: how far the Moon had travelled ahead of the Sun when you were born. Astrologers read it as a kind of temperament, a preferred moment in the cycle.
Take the example chart used across this blog, for a made-up birth on 12 April 1994 in Lisbon. The Sun is at 22° Aries and the Moon at 11° Taurus, only a short way ahead: a birth in the new moon phase, often read as someone who likes to start things and learns by doing. A second made-up chart, for a baby born on 6 March 2026 in Toronto, has the Sun at 15° Pisces and the Moon at 20° Libra, past the opposition: a disseminating phase, linked with sharing, teaching and passing things on.
To find your own, open your chart and look at the Sun and the Moon together. Our guide to the Sun, the Moon and the rising sign explains what each of the two means on its own; the phase describes how they work together. The birth chart calculator shows both positions in a few seconds.
Questions people ask
What is the difference between a new moon and a full moon in astrology?
At a new moon the Sun and the Moon are in the same sign, and the Moon is dark: astrology links it with beginnings and intentions. At a full moon they stand in opposite signs and the Moon is fully lit, which is read as a time of culmination, visibility and review. One opens the cycle, the other marks its peak.
What does it mean to be born under a full moon?
It means the Moon stood opposite the Sun in your birth chart. Astrologers often read this as a personality shaped by awareness of two sides, someone who sees contrasts clearly and tends to find themselves through relationships. The signs of your Sun and Moon say which two sides are involved.
How long does each moon phase last?
In the eight-phase system each phase covers an eighth of the cycle, about three and a half days. The exact new, first quarter, full and last quarter moons are moments, but astrologers usually treat the day around each one as its window.
Why are there 13 new moons in 2027?
A lunar cycle lasts 29.50 days on average, so twelve cycles take about eleven days less than a calendar year. When the first new moon falls early in January, a thirteenth one fits in before the year ends. In 2027 that gives 13 new moons and 12 full moons.