Last Quarter Moon Meaning

With a constructed Sun at 10 degrees of Aries, the exact last quarter Moon sits at 10 Capricorn; a Moon at 12 Capricorn falls inside the 270-to-315-degree band, while one at 8 Capricorn does not.

The Moon starts each cycle at the new Moon, circles the Earth, and returns toward the Sun. The last quarter is the third of the four quarter points: the Moon has covered three quarters of the way around and has one quarter left to go. The word quarter names a share of the journey, not a share of the disc, which is why a quarter Moon looks half lit.

Many calendars call the same moment third quarter. At that point the Moon stands 90 degrees behind the Sun as seen from Earth, which is the same thing as 270 degrees ahead of it. It falls about 22 days into a cycle that lasts about 29.5 days.

Astronomers call the Sun-to-Moon angle the elongation. You measure it eastward along the zodiac, from the Sun's longitude to the Moon's. Because the Moon gains about 12 degrees a day on the Sun, the angle grows by about 12 degrees a day, and dividing any angle by 12.2 gives the cycle day.

Last quarter is the Moon of the second half of the night. It rises around midnight, stands highest around sunrise, and sets around midday. That is why you often catch it hanging in a morning sky, pale against the blue, long after the stars have gone.

In the Northern Hemisphere the left half is lit. The lit side always faces the Sun, and at this phase the Sun is still below the eastern horizon, which is to the left when you face south. In the Southern Hemisphere the picture is flipped and the right half is lit, so check where you are before you trust a photo.

Sky watchers also know this phase for the tides. At both quarter Moons the pull of the Sun and the Moon on the oceans acts at right angles, and the result is the smaller tidal range called neap tides.

In the lunar traditions that give each phase a theme, the first half of the cycle is about starting and building, and the second half is about reflecting and sorting. Last quarter sits at the turn from reaping to clearing. The usual vocabulary is review, revision, release and reassessment.

Those themes are an interpretive habit, not a physical effect. The Moon does not change how a project is going. What the phase offers is a regular, visible cue to stop and ask the questions that busy people skip.

• What did I start earlier in this cycle, and what actually happened?
• Which habits or commitments gave back more than they took?
• What am I carrying that no longer has a purpose?
• What should I carry forward into the next cycle, and what can I stop?

You can do this in about twenty minutes, with paper. It works because it is regular, and because it separates what happened from how you felt about it.

1. Write the dates: the new Moon that began this cycle and the one that will end it.
2. List the actions you took, one line each, without judging them.
3. Mark each line as worked, did not work, or too early to tell.
4. Choose one thing to stop, one thing to keep and one thing to adjust.
5. Put the adjustment on the calendar for the coming week, so the review ends in an action.

Take a constructed chart with the Sun at 10 degrees of Aries. Aries starts at 0 degrees of the zodiac, so the Sun sits at longitude 10. Add 270 degrees and the Moon is at longitude 280.

Capricorn runs from 270 to 300 degrees, so 280 is 10 degrees of Capricorn. The Moon is in the sign a quarter of the zodiac before the Sun's sign, and the two bodies form a square, an aspect of 90 degrees. The exact quarter is the instant the angle reaches 270 degrees. The last quarter phase, in the eight-phase convention used across this site, is the band from 270 to 315 degrees that opens at that instant. A Moon at 12 degrees of Capricorn (272 degrees ahead of the Sun) is inside the band, while one at 8 degrees of Capricorn (268 degrees ahead) falls just short, in the last few hours of the waning gibbous band.

People who use natal phases say a person born near this point has a Moon that is square to the Sun in the chart. Whether that says anything useful about a life is a matter of interpretation, and you should hold it loosely.

Is last quarter the same as third quarter? Yes. Two names, one phase. Some calendars use one, some the other, and a few use waning half Moon.

Does last quarter last all day? The exact quarter is an instant, about 22 days after the new Moon. In the eight-phase convention used across this site, the last quarter phase is the band from 270 to 315 degrees that opens at that instant, so it runs about 3.7 days, from about day 22.1 to day 25.8. Some calendars label only the day of the instant.

Is the Moon really half full? Half of the disc that faces us is lit, which is why it looks like a half disc. The Moon itself is a whole sphere with one half always lit by the Sun. At a quarter phase we look at that lit half from the side, so about half of the visible face is bright.

Ending a project, leaving a job or cutting a tie should depend on evidence and responsibilities, not on the date a calendar shows. A phase can remind you to check; it cannot tell you what the check will find.

A practical way to use it: put the last quarter on your calendar as a monthly review slot, and give the slot a fixed task, such as the five steps above. If the date falls at a bad time, move it by a few days. The habit matters more than the exact phase.

Review and release are interpretive themes, so ending a project, job or tie should rest on evidence and responsibilities, not the calendar.