Moon Calendar
New and full moon dates, computed from the real sky.
When is the next full moon, and when is the next new moon? This calendar gives the exact dates, computed with the standard astronomical method (the Meeus phase formula) rather than guessed or generalised. The Moon completes one cycle of phases in about twenty nine and a half days: it begins dark at the new moon, when the Sun and Moon share the same place in the sky, grows to the full moon roughly two weeks later, when the Moon stands opposite the Sun and is fully lit, then wanes back to dark. The list below gives the upcoming new and full moons with their dates and times in Universal Time (UTC). This is an astronomical reference, not a forecast of luck or doom: traditionally the new moon marks beginnings and the full moon marks culmination and release, but the dates themselves are simply where the real Moon is in its cycle.
Upcoming new and full moons
New moon: the dark Moon, traditionally a time of beginnings and intentions.
Full moon: the Moon fully lit, traditionally a time of culmination, clarity and release.
Frequently Asked Questions
How are these dates calculated?
With the standard Meeus phase algorithm, the same astronomical method used by ephemerides. It gives the exact instant of each new and full moon to within about a minute, then shown in Universal Time (UTC).
What is the difference between a new moon and a full moon?
At the new moon the Sun and Moon are in the same direction, so the Moon is dark. At the full moon the Moon is opposite the Sun and fully lit. They alternate roughly every two weeks.
Is a full moon a good or bad sign?
Neither. The full moon is an astronomical event, not an omen. In tradition it is read as a peak or a time of release, but this page is a calendar of real dates, not a prediction.