Is this about gardening?

It began there. The classical advice to plant on a waxing Moon is the same advice for starting anything meant to grow. The engine does not distinguish; the sky does not either.

What if I started something on a void Moon?

Then the old texts would say to expect it to need restarting. Give it a second, proper beginning on a clear day; nothing is lost.

How far ahead does the list for starting or building something 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 start or build something

Planting, in the literal and the old sense: starting a garden, a business, a project, a habit, a building. Something you intend to grow. The checker below is set to starting or building something; pick a day and it judges each part of it, with the rule and its source.

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Computed hourly

The next clear windows for starting or building something

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, 8:58 pm Central to Thu, Oct 22, 11:58 pm CentralOct 20, 01:58 UTC to Oct 23, 04:58 UTC
Sat, Oct 24, 5:58 pm Central to Sun, Oct 25, 8:58 am CentralOct 24, 22:58 UTC to Oct 25, 13:58 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

The rule here is the oldest in the book: plant on a waxing Moon so it grows with the Moon, and not on a void Moon, when nothing started comes to much. The engine favours the Moon in a fixed sign for things meant to last, Mars's day Tuesday for building, and the Moon applying to a benefic.

Against it: a waning Moon (finish, don't start), the dark of the Moon (plan instead), and the Moon applying to Saturn (delay) or Mars (breakage).

The new Moon is for deciding what to start. The week after it is for starting.

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 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 Moon in a fixed sign: what you start now tends to stick. Choose it for permanence, avoid it for anything you may want to unwind.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

Founding the company, starting the project, breaking ground, the first day of a new habit for the team. This is the action the business planner in Rhythm is built around: the new Moon as the start of a cycle and the full Moon as its review.

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.