Is a full Moon good for a launch?

For being seen, yes; the classical rule favours visibility at the full Moon. For something that needs to grow after launch, the waxing days before it are stronger. The checker weighs both.

What about launching on a Saturday?

Saturday is Saturn's day, which the classical day-ruler doctrine favours for endings and structure, not beginnings. It is not forbidden; it simply does not get the day-ruler's help.

How far ahead does the list for launching or announcing go?

Two weeks. The list is recomputed every hour from the real sky, so it is always the next two weeks from now. Bookmark the page.

What if there is no clear window?

Sometimes the sky is busy for a stretch and the next two weeks have none. Then the window checker will show you the least bad part of a day, and the answer is to go with your eyes open or wait.

What time zone are these in?

Central time first, with UTC under it. The embedded checker on this page shows every window in your own time.

Best days to

Best days to launch or announce

A product going live, a website, an announcement, a first post, an opening day. The moment something becomes public. The checker below is set to launching or announcing; pick a day and it judges each part of it, with the rule and its source.

Nothing you enter here is saved. Open it full-size in Rhythm →

Computed hourly

The next clear windows for launching or announcing

Right now the Moon is in Aquarius, first quarter. Venus and Saturn are retrograde.Computed Oct 19, 07:58 UTC. The tool shows your own time.

Mon, Oct 19, 5:58 am Central to Mon, Oct 19, 5:58 pm CentralOct 19, 10:58 UTC to Oct 19, 22:58 UTC
Mon, Oct 19, 11:58 pm Central to Wed, Oct 21, 5:58 am CentralOct 20, 04:58 UTC to Oct 21, 10:58 UTC
Wed, Oct 21, 8:58 am Central to Thu, Oct 22, 11:58 pm CentralOct 21, 13:58 UTC to Oct 23, 04:58 UTC

The general sky, in Central time and UTC. Add your rising sign in the checker and it reads against your chart, in your own time.

What the sky weighs

The rules for this

Launches want to be seen and to grow, so the engine looks first at the Moon's phase: a waxing Moon, from new to full, is the classical time for beginnings; a waning Moon is for finishing. The full Moon itself favours visibility, and the dark of the Moon, the day or two before new, is the time to plan rather than appear.

It also checks the void-of-course Moon (a launch then tends to go unnoticed), the Sun's day (Sunday) and Jupiter's day (Thursday), and the Moon in a cardinal sign (Aries, Cancer, Libra, Capricorn) for speed. Mars retrograde counts against action of any kind.

The best launch window is usually the week after a new Moon. The checker shows the exact days.

Every rule that can fire, with its source

-3 The Moon makes no more contacts before leaving its sign. Matters started now tend to drift — nothing comes of them.William Lilly, Christian Astrology (1647); concept from Sahl ibn Bishr, On Elections, trans. Benjamin Dykes (2008)
-2 Mercury retrograde: paperwork, agreements, and messages misfire more easily. Review is favored; new signatures are not.Sahl ibn Bishr, On Elections, trans. Benjamin Dykes (2008); Hephaistio of Thebes, Apotelesmatics Book III, trans. Benjamin Dykes (2013)
+2 The Moon is increasing in light — the classical window for beginnings meant to grow.Dorotheus of Sidon, Carmen Astrologicum Book V, trans. Benjamin Dykes (2017)
-1 The dark of the Moon: weak light, weak starts. Seed privately; announce later.Hephaistio of Thebes, Apotelesmatics Book III, trans. Benjamin Dykes (2013)
+1 Maximum light: maximum visibility. Good for what needs to be SEEN; hard on what needs quiet.Vettius Valens, Anthologies, trans. Mark Riley (2010)
+1 Moon in a cardinal sign: fast starts, quick results, short shelf-life. Right for initiative, wrong for forever.Dorotheus of Sidon, Carmen Astrologicum Book V, trans. Benjamin Dykes (2017)
+2 The Moon's next contact is a friendly one to a benefic — the matter lands softly.Sahl ibn Bishr, On Elections, trans. Benjamin Dykes (2008)
-2 The Moon's next contact is a hard one to a malefic — friction arrives before the finish line.Sahl ibn Bishr, On Elections, trans. Benjamin Dykes (2008)
-1 Mars retrograde: applied force backfires more easily. Favor strategy over push.Hephaistio of Thebes, Apotelesmatics Book III, trans. Benjamin Dykes (2013)
+1 Today's planetary ruler favors this kind of action (Sun-Sunday: visibility; Moon-Monday: home and gathering; Mars-Tuesday: contest and effort; Mercury-Wednesday: contracts and messages; Jupiter-Thursday: growth and asking; Venus-Friday: partnership; Saturn-Saturday: endings and structure).Picatrix (Ghayat al-Hakim) Book I, trans. Dan Attrell & David Porreca (2019)

For a business

How owners use it

Product launches, openings, campaigns, the press release, the new price going live. For a small business the pattern that works is simple: plan on the dark of the Moon, launch in the first week after the new Moon, review at the full Moon.

Rhythm for Business plans the quarter around these windows: the new moon as the start of a cycle, the full moon as its review, and the clear windows for the decisions that matter. Open Rhythm for Business.