Best Time for a Spell: Moon, Day and Hour
Moon phase, planetary weekday and planetary hour, in the order worth learning them, what to do when they disagree, and the cases where timing is beside the point.
Contents
Ritual timing runs on three layers. The moon phase is the foundation: waxing and full for anything you want to draw in or increase, waning and new for anything you want to remove or end. The weekday adds a classical planetary ruler — Monday the Moon for intuition and home, Tuesday Mars for courage and defense, Wednesday Mercury for communication and contracts, Thursday Jupiter for abundance, Friday Venus for love, Saturday Saturn for boundaries and endings, Sunday the Sun for confidence and recognition. The planetary hour is the fine tuning: the day is divided into twelve equal parts between sunrise and sunset, rarely sixty minutes long, and the first hour after sunrise always belongs to the ruler of that weekday. When the layers disagree, moon phase wins, weekday beats hour, and your actual attention beats all three. Timing is a traditional framework, not a demonstrated effect.
The seven-day planetary week assigning each day a classical planetary ruler is a late-antique system still visible in the Latin-language weekday names.
A planetary hour is one twelfth of the interval between sunrise and sunset, so it is rarely sixty minutes; the first hour after sunrise always belongs to the ruler of that weekday.
The synodic month is 29.53 days, and Mercury's retrograde motion is a real optical effect of Earth overtaking Mercury, occurring three or four times a year.
Consolidated correspondence tables matching planets to purposes, colors, herbs and stones were largely assembled in the twentieth century and vary noticeably between sources.
Waxing and full moon for drawing in, waning and new for removing, is a broadly attested distinction in European folk practice.
Practitioners commonly move contract and communication work outside Mercury retrograde, avoid working during eclipses, and treat protection work as exempt from timing altogether.
Choosing the correct moon phase, weekday and planetary hour strengthens the effect of a ritual.
VERIFIED = verifiable in scientific or official sources · TRADITIONAL = historically or culturally recorded · LIVED PRACTICE = widely practiced, experiential knowledge · NOT PROVEN = spiritual interpretation, not scientifically established.
Ask when to do a spell and you will get three different answers, usually from three different systems, usually stacked on top of each other without anyone saying so. The moon phase. The day of the week. The planetary hour. They come from separate traditions, they operate at different scales, and you do not need all three to begin.
This is how the three layers actually work, in what order to learn them, and — the part most timing guides leave out — when the timing does not matter at all.
Layer one: the moon phase
The foundation, and the only layer most practitioners ever need. The rule is simple enough to state in a line: waxing draws, waning removes.
| Phase | Roughly | Traditionally used for |
|---|---|---|
| New moon | Day 0 | First intentions, beginnings, planting something you will not see for weeks. |
| Waxing | Days 1–13 | Growth, attraction, building, drawing in. Money, work, love, momentum. |
| Full moon | Day 14 | Peak. Completion, charging tools, gratitude, and — counterintuitively — release. |
| Waning | Days 15–28 | Removing, cutting, banishing, breaking a habit, ending a thing. |
The full moon does double duty because it is a hinge: the last moment of the waxing half and the first of the waning. In practice most people use it for whatever is loudest that month.
The genuinely useful part of moon timing is not metaphysical. A lunar cycle is twenty-nine and a half days, which means you are never more than two weeks from the right window for any working. That is short enough to keep you honest and long enough to stop you doing a banishing at three in the morning because you are upset. Practical forms of both halves: the new moon candle cycle and the full moon ritual.
Layer two: the day of the week
Each weekday carries a classical planetary ruler. This is not folklore invented for the purpose — the seven-day planetary week is a late-antique system, and it is still visible in the names themselves. Sunday and Monday are the Sun and Moon in English. Tuesday through Friday were swapped for Germanic gods of similar function, which is why the Latin languages keep it more plainly: mardi for Mars, mercredi for Mercury, jeudi for Jupiter, vendredi for Venus. Saturday kept Saturn in English and lost him in French.
| Day | Ruler | Work it suits |
|---|---|---|
| Monday | Moon | Intuition, dreams, home, family, emotional matters, divination. |
| Tuesday | Mars | Courage, conflict, defense, cutting through, protection. |
| Wednesday | Mercury | Communication, contracts, exams, travel, negotiation, study. |
| Thursday | Jupiter | Abundance, expansion, legal matters, luck, generosity. |
| Friday | Venus | Love, attraction, beauty, reconciliation, friendship, art. |
| Saturday | Saturn | Boundaries, endings, binding, discipline, long-term structure. |
| Sunday | Sun | Success, vitality, confidence, recognition, health of the whole. |
Combining the first two layers gets you most of the way there. A love working on a waxing Friday. A boundary working on a waning Saturday. Those two facts cover the vast majority of what people actually want to time. Correspondences for scent by day, if you work that way, are laid out in planetary incense by weekday.
From the temple
Moon Cosmos Incense
$26.95 · hand-rolled sticks for Monday
Timing is mostly a memory problem — you learn the table and then forget which day it is. One practical fix is to give a day a smell. Burning the same thing every Monday builds the association faster than any chart, and Monday is the Moon's day, which makes it the natural place to start if you are working the lunar layer. Any incense you reserve for one day will do this; this is the one we use.
Layer three: the planetary hour
The fine tuning, and the layer where most people give up — usually because it is explained badly. It is not complicated. It is just not what you expect.
A planetary hour is not sixty minutes. The system divides the time from sunrise to sunset into twelve equal parts, and sunset to sunrise into another twelve. In June a daylight hour might run eighty minutes; in December, forty. They are only equal to clock hours at the equinoxes.
The rulers then run in a fixed sequence — the Chaldean order, from slowest apparent motion to fastest: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon — cycling continuously through all twenty-four. The thing that makes it work is this: the first hour after sunrise always belongs to the ruler of that day. Sunrise Friday is a Venus hour. Sunrise Tuesday is a Mars hour. That is not a coincidence; it is the mechanism that generated the order of the weekdays in the first place, which is one of the more satisfying facts in the whole system.
The practical shortcut, and it is a good one:
- The first hour after sunrise on the matching weekday. Doubles the day's ruler and needs no calculation beyond a sunrise time.
- The first hour after sunset on the same day. Also ruled by the day's planet, and easier for anyone who works.
- Anything more precise wants a planetary hour calculator, of which there are many free ones. Do not do this arithmetic by hand for a candle.
The special windows
Three cases that come up constantly, with the honest version of each.
Eclipses. The common advice is not to work during one. Traditional astrology treats eclipses as disruptive rather than usable, and the practical version is sound enough: an eclipse is an emotionally loud few days and most people's judgment about what they want is worse then, not better. Not a prohibition — a reason to wait a week and see if you still want it.
Mercury retrograde. The apparent backward motion is real and is an optical effect of Earth overtaking Mercury in orbit; it happens three or four times a year. The interpretation attached to it — communication and contracts going wrong — is astrological convention, not a measured effect. Conventional practice moves contract and communication work out of the window and treats it as good for anything with "re-" in front: review, revise, revisit, repair. If your working is retrospective, this is arguably the best time for it.
Portal days and numeric dates. Recurring digit dates and similar windows are a recent framework rather than an inherited one; we go through where it came from in portal days explained. They function well as a scheduling prompt and there is nothing wrong with using them that way.
Where the correspondence tables came from
Worth a paragraph, because the tables above are presented everywhere as inherited and they are only partly that.
The planetary rulership of the weekdays is genuinely old and genuinely documented. The planetary hour system is medieval and well attested in the astrological literature. The moon-phase distinction between drawing and removing is broadly traditional and turns up across a lot of European folk practice. What is far more recent is the tidy one-page table matching every planet to a list of purposes, colors, herbs, metals and stones. Those consolidated correspondence charts were largely assembled in the twentieth century, drawing on Golden Dawn material and on the mid-century occult publishing boom, and they vary noticeably from book to book — which is the tell. An inherited system does not disagree with itself about which day is for money.
This does not make the tables useless. A correspondence system is a memory structure: it gives every kind of working a fixed place to live so you are not improvising from scratch each time. It works whether or not the associations are ancient, and it works better if you pick one table and stay with it rather than averaging six.
The hierarchy, when the layers disagree
They will. Your Venus day falls in a waning moon. The right hour is 4:40 a.m. What then?
- Moon phase wins. It is the coarsest layer and the one with the clearest logic. A drawing working in a waning moon is genuinely working against the grain of the system.
- Day beats hour. If you cannot get both, take the weekday and do it in the evening like a normal person.
- Your actual attention beats all three. This is not a consolation prize. It is the real hierarchy.
When timing does not matter
Which is more often than the guides admit.
- Protection and emergencies. Nobody in any tradition has ever been told to wait for Tuesday. Urgent work happens when it is needed.
- Daily and devotional practice. A morning sitting, a lit candle, an ancestor offering. These run on their own rhythm and timing correspondences do not apply.
- Anything you will only do once if you schedule it. A working you actually perform on a Wednesday beats a perfectly timed one you keep postponing to the ideal Friday. This is the most common failure in the whole subject: timing becomes a reason not to start.
If you want a structure that survives bad timing, build the ritual itself properly and let the calendar be secondary — how to write your own ritual covers the shape.
A worked example
You want to ask for a raise. Timing it, layer by layer:
- Phase: waxing. You are drawing something in, so the two weeks between new and full.
- Day: Thursday for Jupiter — abundance and increase — or Sunday for the Sun if the ask is really about recognition. Wednesday for Mercury if the hard part is the conversation itself rather than the money.
- Hour: first hour after sunrise Thursday, or first after sunset.
- Reality: your manager has a slot on Tuesday. Take Tuesday. Do the preparation in the good window and the conversation when the calendar allows.
That last line is the whole method. Timing shapes preparation. It does not schedule the world.
What we don't promise
- We do not claim timing makes a working effective. There is no evidence that any of this influences outcomes, and the correspondences are traditional rather than tested.
- We do not claim Mercury retrograde causes anything. The retrograde motion is real astronomy; the effects attributed to it are astrological convention.
- We do not claim a well-timed working substitutes for medical, legal or financial advice.
For the most common application of the first layer, worked through step by step, see the new moon ritual.
Frequently asked questions
What moon phase should I do a spell in?
Waxing or full for anything you want to draw in or increase. Waning or new for anything you want to remove, end or reduce. That single distinction covers most of what moon timing is for.
What is a planetary hour?
A division of the day into twelve equal parts between sunrise and sunset, and twelve more between sunset and sunrise. They are rarely sixty minutes. Each is ruled by one of the seven classical planets in the Chaldean order, and the first hour after sunrise always belongs to the ruler of that weekday.
Which day is best for love work?
Friday, ruled by Venus. Combined with a waxing moon it is the classic window for attraction and reconciliation. Saturday, ruled by Saturn, is the traditional choice for the opposite — endings and boundaries.
Can I do a spell during Mercury retrograde?
Yes. Conventional practice moves contract, negotiation and communication work outside the window and treats it as well suited to anything revisited or repaired. The retrograde is a real optical phenomenon; the meaning attached to it is convention.
What if I can't match the right timing?
Do it anyway. Attention and clarity outweigh all three timing layers, and a working performed on the wrong day beats one indefinitely postponed to the right one. If you can match only one layer, match the moon phase.
Do I need to know all three layers to start?
No. Learn the moon phase first and use nothing else for a few months. Add the weekday when the phase distinction has become automatic. The planetary hour is optional and many long-time practitioners never use it.
Should I avoid working during an eclipse?
Traditional practice says yes, and the practical reason holds up: eclipse periods are emotionally noisy and judgment about what you actually want tends to be poorer. Waiting a week costs nothing and often changes the request.
Sources and further reading
- The Chaldean planetary order and its role in generating the seven-day week — standard history-of-astronomy references.
- Classical planetary hour systems in Hellenistic and medieval astrological literature.
- Astronomical data on synodic month length (29.53 days) and Mercury's retrograde periods.
- Ronald Hutton on the modern assembly of correspondence tables in contemporary witchcraft.
Continue here: planetary incense by weekday · the full moon ritual · how to write your own ritual