Short, factual guides to the Moon: dates, phases, eclipses, and how to choose a moon app. Written in the almanac voice, with no horoscopes and no predictions.
Moon ephemeris: what the sky is about to do
The oldest page of any almanac is the one that looks forward. This one is computed the moment you open it, in your own time zone: the phases to come, the eclipses on their way, and the app's own rendezvous.
What is the moon phase today?
The reading below is computed the moment you open the page: same algorithms, same wording as the Plenilune app.
When is the next full moon?
The date and hour below are computed the moment you open this page, with the same astronomical algorithms as the Plenilune app, in your own time zone.
When is the next new moon?
The date and hour below are computed the moment you open this page, with the same astronomical algorithms as the Plenilune app, in your own time zone.
The moon calendar of this month, day by day
The month below is drawn for today, in your time zone: one Moon for every day, and the four principal phases on the day their instant falls.
Where is the Moon right now?
The Moon is not always up when it is dark, and it is often up when it is light. Where it stands at this moment follows from one thing: its phase, which fixes its position relative to the Sun.
Full moon calendar 2026: every date, with its name
Every full moon of 2026, computed with the reference astronomical algorithms: first shown in Universal Time, then in your own time zone once the page has loaded.
Full moon calendar 2027: every date, with its name
Every full moon of 2027, computed with the reference astronomical algorithms: first shown in Universal Time, then in your own time zone once the page has loaded.
Full moon calendar 2028: every date, with its name
The thirteen full moons of 2028, to the minute, each one with its name. The year ends on 31 December with a blue moon that is also a total lunar eclipse.
Supermoon, blue moon, blood moon: what they are, and the next dates
Three names the newspapers love, none of them astronomical terms, and all three describing something real. Here is what each one is, and when the next ones fall.
Lunar eclipses: the next dates, and why the Moon turns red
A lunar eclipse is the one night the phases lie: the full moon darkens, then glows copper-red. Here are the next dates, and the physics of that colour.
The 8 phases of the Moon, explained simply
The whole cycle is a matter of geometry: the Sun always lights half of the Moon. What changes is how much of that lit half faces you.
Why the Moon looks upside down in the southern hemisphere
Travellers notice it before they can explain it: from Sydney, the Moon of the postcards hangs the wrong way up. Nothing happened to the Moon. Something happened to you.
Gardening by the Moon: the traditional calendar, explained
Lunar gardening is one of the oldest uses of the almanac. Here is what the tradition actually prescribes, told as tradition, with what the science says alongside.
A moon widget for your iPhone: home screen and lock screen
A moon app is really a widget with an app behind it: the glance you actually use lives on the home screen. Plenilune's widgets put an engraving there instead of a photograph.
A moon phase app for iPhone: how to choose one
People install a moon app for one reason: a two second look, once a day. That habit decides whether the app is still there a month later. It is also the only useful way to choose one.
Plenilune vs Deluxe Moon: which moon app is for you?
I make Plenilune, so read this comparison knowing where I stand. Deluxe Moon has been on the App Store for more than ten years and does far more than my app. The real question is whether you need all of it.