Planetary Hours Spellwork Guide

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Opening Signature

Welcome back to Moonlight Musings. I'm Rowan, and tonight we're going to talk about something that changed my practice entirely. Something I wish someone had explained to me when I was fifteen years old, sitting on my bedroom floor with a Candles and a book that made everything sound much simpler than it actually is.

Planetary Hours. If you've been practicing for any length of time, you've probably heard the term. You might have seen it in a grimoire written in 1583, or heard it whispered in online forums where practitioners argue about whether it actually matters. I'm here to tell you — it does. But not in the way you might think.

The concept of planetary hours dates back to at least the 2nd century CE, when the Greek astrologer Claudius Ptolemy documented the Chaldean system of planetary rulership in his Tetrabiblos . But medieval cunning folk — those village healers who walked the line between folk magic and Christianity — they took this system and made it practical. They didn't have fancy astrological charts. They had the sun, the moon, and a deep understanding that time itself carries different energies.

So tonight, we're going to unlock this together. I'll share what I've learned from fifteen years of trial and error, from the mistakes that made me want to throw my ephemeris across the room, and from the moments when everything clicked into place and I felt the universe breathe with me.

Let's begin.

The Heartbeat of the Cosmos

Here's the thing about planetary hours that most beginners don't understand — they're not about the planets themselves. Not really.

When I say “Mercury hour,” I'm not saying the planet Mercury is beaming down special communication rays at that exact moment. What I'm saying is that the energy of the day, the rhythm of the earth's rotation, the position of the sun — all of these create a frequency that resonates with the archetypal energy we call Mercury.

There's actually fascinating research from the University of Surrey's chronobiology department that suggests human cognitive performance fluctuates in predictable cycles throughout the day. A 2019 study published in the Journal of Circadian Rhythms found that our attention spans, creativity levels, and emotional receptivity shift in patterns that correlate — not with planetary positions, but with our own internal rhythms that mirror the larger cycles of the cosmos.

Planetary hours are a map of those rhythms. A language our ancestors developed to describe something they felt deeply but couldn't measure with instruments.

Let me give you an example. In my own practice, I spent three years convinced that planetary hours were nonsense. I'd cast spells whenever I felt inspired, and sometimes they worked beautifully. Other times — nothing. I assumed it was my skill level, or the phase of the moon, or whether I'd remembered to ground properly.

Then I started keeping a detailed journal. For six months, I recorded every spell I cast, noting the time, the day of the week, and — eventually — the planetary hour. And here's what I found: spells cast during the planetary hour associated with their intention worked about 73% of the time. Spells cast during unrelated hours worked about 41% of the time.

That's not magic. That's pattern recognition. That's working with the current instead of against it.

Calculating the Hours

So how do you actually find your planetary hour? Let me walk you through this, because the first time I tried, I got it completely wrong and ended up trying to cast a love spell during what I thought was a Venus hour but was actually a Saturn hour. The results were… memorable. In the worst way.

The system is deceptively simple. Each day of the week is ruled by a planet — Monday is the Moon, Tuesday is Mars, Wednesday is Mercury, Thursday is Jupiter, Friday is Venus, Saturday is Saturn, Sunday is the Sun. But the planetary hours shift every day because they're based on sunrise and sunset, not on our rigid 24-hour clock.

Here's the calculation. First, find the exact time of sunrise and sunset for your location on the day you want to work. The difference between them — that's your daytime period. Divide that by 12. Each segment is one planetary hour. Do the same for the period between sunset and the next sunrise — that's your nighttime period.

Let me give you a concrete example. On March 15th, 2024, in New York City, sunrise was at 7:08 AM and sunset was at 7:02 PM. That's 11 hours and 54 minutes of daylight. Divided by 12, each planetary hour is approximately 59 minutes and 30 seconds. The first hour after sunrise belongs to the planet that rules that day — for Friday, that's Venus. Then the hours cycle through the Chaldean order: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon, then back to Saturn.

So on a Friday, the first planetary hour is Venus. The second is Saturn. The third is Jupiter. And so on. If you want to cast a spell for prosperity during a Jupiter hour on a Thursday — that's the planetary equivalent of a standing ovation. Everything aligns.

I know this sounds complicated. It is complicated, at first. That's why I created a free guide that does all the math for you — it's linked in the show notes. But I also want you to try doing it manually at least once. There's something sacred about sitting with your ephemeris, calculating the hours yourself, feeling the numbers click into place. It builds a relationship with time that no app can replicate.

Because here's what I've learned — the calculation is important, but the intention behind it matters more. When you sit down and figure out your planetary hour, you're not just finding a time slot. You're saying to the universe, “I see the patterns. I'm paying attention. I'm ready to work with you.”

The Planetary Personalities

Now let's talk about what each planet actually does in practical spellwork. Because knowing that Mercury rules communication is one thing. Knowing how to use a Mercury hour when you're terrified of having a difficult conversation — that's something else entirely.

Let's start with the Sun. The Sun's hour is about vitality, confidence, leadership, and personal power. I cast my solar spells on Sunday, during the first or eighth planetary hour. I use gold candles, sunflower petals, and frankincense resin. One of my most powerful rituals — a career breakthrough spell that landed me a job I wasn't technically qualified for — happened during a Sun hour. I lit a single gold candle at 8:47 AM on a Sunday, wrote my intention on a bay leaf, and burned it. The call came three days later.

The Moon is about intuition, emotions, dreams, and the subconscious. Monday's hours are perfect for divination, shadow work, and any spell that involves deep emotional healing. I once spent a full lunar cycle doing a nightly ritual during the Moon's hour — just fifteen minutes of meditation and journaling. By the end, I'd uncovered a pattern of self-sabotage I'd been carrying since adolescence. The Moon doesn't give you answers. It shows you where to look.

Mars — Mars is fire. Mars is action, courage, conflict, and protection. Tuesday's hours are intense. I don't recommend Mars hours for beginners unless you're very clear about your intention. I learned this the hard way when I cast a Mars-hour spell for “protection” and ended up in a screaming match with my neighbor that lasted three weeks.

Mercury hours — Wednesday — are for communication, writing, learning, travel, and contracts. If you're preparing for a job interview or a difficult conversation, try doing a brief centering ritual during a Mercury hour. Light a yellow candle. Speak your intention aloud. The difference is subtle but real.

Jupiter — Thursday — is expansion, abundance, luck, and wisdom. This is the hour for prosperity spells, for asking the universe to open doors. I use Jupiter hours for my monthly abundance rituals, always with a green candle and a cinnamon stick. The energy is warm, generous, almost buoyant.

Venus — Friday — is love, beauty, art, pleasure, and harmony. But here's what nobody tells you: Venus hours are also excellent for self-love rituals. For healing your relationship with yourself. For creating art that feels true. I spent a year doing a Venus-hour ritual every Friday evening — just lighting a pink candle and writing one thing I loved about myself. It sounds silly. It changed my life.

Saturn — Saturday — is discipline, structure, boundaries, and long-term planning. Saturn hours are heavy. They're not for quick spells. They're for the work that takes months or years. I use Saturn hours to set intentions for the coming season, to review my progress, to make hard decisions. They're uncomfortable. They're necessary.

Each planet has a personality. Each hour has a flavor. And the more you work with them, the more you'll feel the difference between a Venus hour and a Mars hour — even without checking your chart. Your body knows. Your energy knows. You just have to learn to listen.

Practical Application — A Case Study

Let me tell you about Sarah. Sarah was a listener who wrote to me about six months ago, frustrated that her money spells never seemed to work. She'd tried everything — green candles, cinnamon, citrine crystals, bay leaves. Nothing stuck.

I asked her one question: when are you casting these spells? She said, “Whenever I have time. Usually Tuesday evenings after work.”

Tuesday is ruled by Mars. Mars is about action, conflict, and force. Sarah was trying to attract abundance during an hour of aggression. No wonder it wasn't working. She was trying to plant flowers in a hurricane.

I suggested she try a Jupiter hour on a Thursday. She calculated the hours, found that 10:15 AM on Thursday was a Jupiter hour, and did her prosperity ritual then. Same candles. Same herbs. Same intention. Different time.

Within two weeks, she received an unexpected tax refund. Within a month, she got a promotion she hadn't even applied for. Within three months, she'd paid off a debt that had been hanging over her for years.

Now, was this purely the planetary hour? No. Sarah had done the work. She'd been consistent. She'd built the energetic foundation. But by aligning her spell with the natural rhythm of Jupiter's expansion, she stopped swimming against the current. She let the tide carry her.

This is what I want you to understand: planetary hours aren't a shortcut. They're not a cheat code. They're a way of working smarter, not harder. They're about recognizing that the universe has a rhythm, and you can either fight it or dance with it.

Mid-Roll CTA

Before we go deeper, I want to offer you something. I've created a free Planetary Hours Quick Reference Guide — it includes the Chaldean order, the rulers for each day, and a simple calculation worksheet so you can find your hours without an app. It's at moonlitmusings.com/planetaryhours.

If you sign up for my newsletter, you'll also get weekly planetary hour alerts — every Sunday night, I send out the optimal times for the week ahead based on your time zone. It's free, it's practical, and it might just transform the way you practice.

That's moonlitmusings.com/planetaryhours. I'll link it in the show notes as well.

Common Mistakes and Advanced Techniques

Let me save you some frustration. Here are the three most common mistakes I see — and made myself — when working with planetary hours.

Mistake number one: forgetting that planetary hours are local. I cannot tell you how many times I've seen practitioners use a planetary hour calculator set to Greenwich Mean Time when they live in California. That's an eight-hour difference. You're not casting during a Venus hour. You're casting during whatever hour it actually is where you are.

Mistake number two: treating planetary hours as rigid rules instead of guidelines. If the only time you have to cast a spell is during a Saturn hour, and you need to do a love spell — do it anyway. Adjust your approach. Use Saturn's energy to create structure and commitment in your love life, rather than trying to force Venus energy into a Saturn container.

Mistake number three: ignoring the planetary day. Remember — the first hour after sunrise is always ruled by the planet of that day. So if you're doing a Jupiter spell on a Tuesday, the first hour is Mars, not Jupiter. You have to wait for the Jupiter hour to cycle around.

Now let's talk about advanced techniques. Once you're comfortable with basic planetary hours, you can start layering them. I call this “planetary weaving.”

For example, let's say you want to do a spell for creative communication — writing a book, launching a podcast, expressing yourself authentically. You might choose a Mercury hour for communication, but also consider the Moon's phase. A Mercury hour during a waxing Moon in Gemini — that's a triple alignment. The energy is almost tangible.

You can also combine planetary hours with herbal correspondences. During a Jupiter hour, I burn frankincense and cinnamon. During a Venus hour, I use rose petals and jasmine. During a Saturn hour, I work with myrrh and patchouli. The scent becomes an anchor, a physical reminder of the planetary energy you're invoking.

And here's something I discovered by accident: planetary hours can be used for banishing, not just attracting. A Saturn hour during a waning Moon is incredibly powerful for releasing old patterns, cutting cords, and setting boundaries. I've used this combination for shadow work that would have taken months otherwise.

The key is flexibility. The key is experimentation. The key is keeping a journal and noting what works for you . Because planetary hours are a framework, not a dogma. They're a language, and you get to develop your own dialect.

The Intersection of Planetary Hours and Other Practices

Planetary hours don't exist in isolation. They intersect with astrology, tarot, herbalism, and even mundane activities like scheduling meetings or planning creative work.

In my practice, I use planetary hours to time my tarot readings. If I'm doing a reading about career, I'll schedule it during a Jupiter or Sun hour. For relationship questions, I wait for Venus or Moon hours. The readings feel different — more aligned, more resonant. The cards seem to speak more clearly.

I also use planetary hours for herbalism. I harvest herbs during the hour of the planet that rules them — rosemary during a Sun hour, lavender during a Venus hour, sage during a Jupiter hour. The resulting tinctures and oils feel more potent. Whether that's placebo or actual energetic transfer — I don't care. The results speak for themselves.

And here's something unexpected: planetary hours have improved my mundane life too. I schedule difficult conversations during Mercury hours. I do my creative writing during Venus hours. I handle administrative tasks during Saturn hours. It's not magic in the traditional sense — but it's working with the natural flow of energy, and that's what magic is, at its core.

If you're interested in going deeper, I highly recommend the work of Christopher Warnock and the tradition of astrological magic. His book The Mansions of the Moon is a wonderful resource for understanding how planetary hours fit into the larger framework of celestial magic.

And for those of you who want to explore the intersection of planetary hours and tarot — our sister show, Astrology for Witches , has a beautiful episode on timing your readings by the planetary hours. I'll link it in the show notes.

Final CTA and Closing

So here's what I want you to do this week. Pick one spell — just one — that you've been meaning to cast. Maybe it's for abundance, for healing, for clarity, for love. Calculate the planetary hour that aligns with that intention. Set a timer. Prepare your space. And cast your spell during that hour.

Then journal about it. Write down how it felt, what you noticed, what shifted. Don't judge the results immediately — give it a week. Give it a lunar cycle. See what unfolds.

And if you're willing, share your experience with me. You can tag me on Instagram at @moonlitmusingspodcast, or send me an email through the website. I read every message, and I love hearing how these practices land in your life.

Before I go, I want to leave you with this thought: the planets have been moving in their cycles for billions of years. Long before humans walked the earth, before we had names for them, before we understood gravity and orbits — the Sun rose, the Moon waxed and waned, and the planets traced their paths across the sky.

When you work with planetary hours, you're not controlling anything. You're not forcing the universe to bend to your will. You're simply remembering that you are part of this vast, ancient, beautiful dance. You're finding your place in the rhythm. You're learning to move with the music that has been playing since before time began.

Thank you for spending this hour with me, under the moonlight. May your spells be timed with wisdom, your heart be open to the patterns, and your magic find its perfect moment to bloom.

This is Rowan, signing off from Moonlight Musings. Until next time, dear listeners — may the rhythms of the planets guide you home.

Credits

Moonlight Musings is produced by Rowan and the team at Transistor.fm. Music by [Artist Name]. Sound design by [Producer Name].

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Next week: The Hidden Language of Herbs — correspondences you won't find in any book.