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Moon calendar · calculated, not copied

Moon Calendar for August 2025

Every phase of August 2025 day by day, with the exact moment of each new and full moon, the sign the Moon is travelling through, and the void-of-course windows in between.

🕓 Times shown in UTC. We calculate in UTC; your browser converts.

New moon and full moon in August 2025

Moon phases day by day

Each row is read at 12:00 UTC on that date — a calendar day has one icon, but the Moon moves through it, so a day near a phase change can read either way by a few hours. 21 of 31 days carry a void-of-course window; they are marked in the last column and listed in full below.

Day Phase Lit Moon in Void
1 Fri First Quarter 50% Scorpio —
2 Sat First Quarter 59% Scorpio —
3 Sun First Quarter 68% Sagittarius void
4 Mon Waxing Gibbous 77% Sagittarius —
5 Tue Waxing Gibbous 85% Sagittarius void
6 Wed Waxing Gibbous 91% Capricorn void
7 Thu Full Moon 96% Capricorn void
8 Fri Full Moon 99% Aquarius void
9 Sat Full Moon 100% Aquarius void
10 Sun Full Moon 98% Pisces void
11 Mon Waning Gibbous 94% Pisces void
12 Tue Waning Gibbous 88% Aries void
13 Wed Waning Gibbous 79% Aries void
14 Thu Waning Gibbous 69% Aries void
15 Fri Last Quarter 58% Taurus —
16 Sat Last Quarter 47% Taurus void
17 Sun Last Quarter 36% Gemini —
18 Mon Waning Crescent 25% Gemini void
19 Tue Waning Crescent 16% Cancer —
20 Wed Waning Crescent 9% Cancer void
21 Thu New Moon 4% Leo void
22 Fri New Moon 1% Leo void
23 Sat New Moon 0% Virgo void
24 Sun New Moon 2% Virgo —
25 Mon Waxing Crescent 5% Virgo void
26 Tue Waxing Crescent 10% Libra —
27 Wed Waxing Crescent 17% Libra void
28 Thu Waxing Crescent 25% Scorpio void
29 Fri First Quarter 34% Scorpio —
30 Sat First Quarter 43% Scorpio void
31 Sun First Quarter 52% Sagittarius —

Void of course Moon in August 2025

Each window runs from the Moon's last exact aspect to a planet until it crosses into the next sign. Check the Moon right now if that is the question you actually came with.

From Until Moon in Last aspect
Scorpio Moon sextile Mars
Sagittarius Moon square Mars
Capricorn Moon conjunction Jupiter
Aquarius Moon conjunction the Sun
Pisces Moon sextile Jupiter
Aries Moon sextile the Sun
Taurus Moon square the Sun
Gemini Moon sextile the Sun
Cancer Moon conjunction Venus
Leo Moon conjunction Mercury
Virgo Moon sextile Venus
Libra Moon sextile Mercury
Scorpio Moon square Mercury

How to read this month

A lunar month is about 29.5 days, so it never lines up with a calendar month. That is why August 2025 can hold two new moons or none at all, and why the same phase name covers several days in a row: the eight names — new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter, waning crescent — are 45-degree slices of the Sun–Moon angle, not instants. The two moments that are instants, the new moon and the full moon, are listed at the top of the page to the minute.

The Moon in column is the zodiac sign the Moon is crossing, which it changes roughly every two and a half days — a different thing from your own Moon sign, which is fixed at birth. The void column marks the stretch between the Moon's last exact aspect and its next sign change. In traditional practice that is a window for finishing and resting rather than launching; it describes timing, not outcomes, and nothing on this page predicts events.

Where the numbers come from

Positions are computed with astronomy-engine, the same engine behind our birth chart calculator, checked against Swiss Ephemeris to within a fraction of an arc minute. The new and full moon moments were verified against AstroPixels (Fred Espenak, NASA/GSFC) and agree to better than two minutes. If you want a month to the second, cross-check a dedicated astronomy source such as timeanddate.com.

Take it further

This calendar is the sky. The tools below put it against your own chart — all free, no sign-up.

Lunar guide collection

Moon Rituals & Lunar Living

The lunar cycle explained, plus simple rituals for the new moon, the full moon and eclipse season.

$19 8 guides · 91 pages · PDF

See what's inside — $19

Frequently asked questions

When is the full moon in August 2025?

9 Aug 2025 at 07:55 UTC, with the Moon in Aquarius. The table above converts that moment to your own time zone, which can move it to the day before or after.

When is the new moon in August 2025?

23 Aug 2025 at 06:07 UTC, with the Moon in Virgo. Times on this page are shown in your browser's time zone once the page loads.

Which time zone are these times in?

They are calculated in UTC and then converted by your browser to whichever time zone your device is set to — the page names it under the heading. A lunation is a single moment for the whole planet, so only the clock reading changes, never the event.

What does "void of course" mean in this table?

The Moon is void of course between its last exact aspect to a planet and the moment it enters the next sign. Traditional practice treats it as a poor window for starting something you want to stick, and a fine one for rest, tidying and finishing off. It is a timing convention, not a forecast of events.

How accurate are these dates?

They come from the same ephemeris engine as our birth chart calculator (astronomy-engine), not from a copied table. New and full moon moments were checked against AstroPixels (Fred Espenak, NASA/GSFC) and agree to well under two minutes.

Esotorium reports and tools are for self-reflection and entertainment. They are not medical, psychological, financial or legal advice, and they do not predict events.