Next New Moon Calculator
Find the exact date of the next new moon from today.
How It Works
The calculator computes the current phase fraction from today's date, then calculates how many days remain until the phase returns to 0 — the new moon. Since the new moon is phase = 0 and the cycle wraps around, days remaining = (1 − current phase) × 29.53059. The result is rounded to the nearest day for the displayed date.
Formula
What Happens at a New Moon?
At new moon, the Moon lies between Earth and the Sun (or very close to that alignment). The illuminated hemisphere faces the Sun and away from Earth, so the Moon is invisible at night. The Moon rises and sets roughly with the Sun, so it is above the horizon only during daylight hours. This makes the new moon a practical "dark sky" period — ideal for observing faint objects like nebulae and distant galaxies, because no moonlight competes with them. The night sky is darkest in the 3–4 days around each new moon.
New Moon vs. Solar Eclipse
Every solar eclipse occurs at a new moon — but not every new moon produces a solar eclipse. The Moon's orbit is tilted about 5° relative to Earth's orbital plane (the ecliptic), so most new moons pass slightly above or below the Sun in the sky without blocking it. A solar eclipse only happens when the new moon occurs near one of the two lunar nodes (the points where the Moon's orbit crosses the ecliptic). This alignment happens roughly twice per year, producing 2–5 solar eclipses annually worldwide (though any given location sees a total solar eclipse only once every 375 years on average).
New Moon and Tides
Spring tides — the strongest tidal range — occur at new moon and full moon. This is because the Sun and Moon are aligned (either on the same side or opposite sides of Earth), and their gravitational pulls combine. At new moon specifically, the Sun and Moon pull in the same direction, producing the highest high tides and lowest low tides of the month. Coastal fishermen, boaters, and surfers often plan activities around the spring tide schedule near new moon.
New Moon in Cultural Calendars
The Islamic calendar begins each lunar month at the first sighting of the crescent moon — typically 1–2 days after the astronomical new moon, when the thin crescent first becomes visible after sunset. The Hebrew calendar and Hindu lunar calendars also tie months to the new moon. In many East Asian traditions, the new moon marks the start of a lunar month and is associated with new beginnings and intentions.
Frequently Asked Questions
When is the next new moon?
Click the button above to instantly calculate today's date relative to the next new moon. New moons occur every 29.53059 days, so there are 12–13 new moons per calendar year.
Can you see a new moon?
No — during a new moon, the Moon's illuminated hemisphere faces away from Earth toward the Sun. The dark side faces us, making the Moon invisible at night. The Moon is technically above the horizon during daylight hours, but the bright sky makes it impossible to see with the naked eye.
Is the new moon the same as a solar eclipse?
No — while every solar eclipse occurs at a new moon, most new moons do not produce eclipses. A solar eclipse requires the Moon to cross the ecliptic plane (pass through a lunar node) at the same time as the new moon phase. This alignment happens only 2–5 times per year worldwide.
What is the difference between new moon and dark moon?
"Dark moon" is an informal term sometimes used for the day or two before the new moon — when the waning crescent has disappeared from view but the new moon has not yet been declared. In astronomy, "new moon" refers to the precise moment of syzygy (Sun-Moon-Earth alignment). In popular astrology, these terms are sometimes used interchangeably.