Planetary Hours Are a Scam, Part I: How They Work
(a poetic userâs guide to a bureaucratic magical system that refuses to die no matter how many calendars we invent)
Somewhere between ancient Babylon and that astrology app that keeps trying to sell you a birth chart consultation, there exists a timekeeping system so absurdly baroque, so mathematically cursed, and so gloriously unnecessary... that I use it anyway.Â
Welcome to my explanation of planetary hours: the most chaotic-beautiful form of cosmic micromanagement you never asked for, but are now, thinking about.
This is Part I of a two-part descent into the time-spiral. Iâll explain how this whole mess actually works, from Mesopotamian priesthoods doing celestial admin at 3 a.m., to Renaissance grimoires full of planetary HR schedules, maybe even your own haunted Google Calendar.
Part II is where I explain why I still use this system, which is entirely built out of ancient math poetry and bureaucratic vibes.
And Part III is just a reference, donât worry.
But first:Â What even are planetary hours? And why are they so annoying???
Section One: What Are Planetary Hours, and Why Are They So Extra
The Architecture of the Planetary Hour System
Okay. So. Planetary hours. At its root, this is ritual timekeeping. Weâre not measuring seconds here, weâre measuring vibes. Itâs about the mood of the light. Not how fast your clock ticks, but how it feels to exist under a certain slice of sky.
Hereâs how it works: You divide daylight and nighttime into twelve segments each, no matter the season. (Yes, thatâs right. Summer daylight hours? Long. Winter daylight hours? Short. Deal with it.) These are called unequal hours or temporary hours, because they literally change in length every damn day. Why make time easy when you could make it â¨a metaphysical puzzleâ¨.
A summer planetary âhourâ? Could be 80 minutes.
A winter one? Maybe 45.
Time isnât a rectangle.Â
Time is a squiggly line that conforms to only the sun.
This system defiantly isn't going to be on your watch. Itâs here for your skin, your shadows, and the way the light hits your floorboards at 4:00 p.m. and makes you feel something.
Every day begins with the planet that rules it:
Sunday = Sun
Monday = Moon
Tuesday = Mars
etc., etc., you get it, classical astrology time.
And then, the hours cycle through the Chaldean order: Saturn â Jupiter â Mars â Sun â Venus â Mercury â Moon (and then back to Saturn, like a weird cosmic conga line)
This order doesnât just rule the hours. Itâs why the seven-day week even exists. Yes. You can thank ancient Mesopotamian time nerds for Mondays. (And maybe also blame them.)
This isnât time as chronology. This is time as character... With a personality disorder.
The Chaldean Order: Imperial Cosmology in a SpiralÂ
Letâs get one thing straight: The Chaldean order isnât really logical. Itâs about how fast they appear to move from Earth. Because obviously the speed that a celestial body vibes across the sky is more important than, like, actual astronomy and math.
So you get this majestic lineup:
Saturn (slow grandpa vibes)
Jupiter (big benevolent gas uncle)
Mars (knife-wielding cousin)
Sun (only child syndrome)
Venus (hot and slightly feral)
Mercury (chaotic neutral in rollerblades)
Moon (frantic toddler made of tears)
Repeat. Forever. Spinning like a magical rolodex thatâs also judging you.
This order was developed by Babylonian priest-astronomers, aka Chaldeans. Note: âChaldeanâ is not an ethnicity here. Itâs a title. As in: âHello, yes, I am a licensed professional sky-stalker.â (They got paid to stare at the stars and overanalyze. My dream job, honestly.)
Later, the Greeks and Romans came along, saw the vibes, and said: Yes, and what if we added twelve more layers of overthinking? (So they did.) From this cosmic filing system we inherited:
the planetary hour sequence
the structure of the seven-day week
basically the entire skeleton of Western astrological magic, and also your burnout cycle
This wasnât really about fact. It was about usefulness. A cosmology designed to generate rhythm. To serve ritual. To set the tone. Itâs not about the facts. Itâs about the vibes.Â
đ Rochberg, The Heavenly Writing (2004)
Unequal Hours: Pagan Timekeeping and the Rejection of Mechanical TimeÂ
Before clocks showed up and started gaslighting entire civilizations into believing time was a fixed, industrialized grid people measured time the old-fashioned way: By light, shadow, vibe.
They used what are called unequal hours (or if you're feeling Latin about it, horae temporales). This system was everywhere, Egypt, Babylon, Greece, medieval Europe, and it worked like this:
You divide the daylight into twelve parts. You divide the night into twelve parts. But daylight in winter is shorter than daylight in summer, so... surprise: An âhourâ in January? Maybe 40 minutes. That same âhourâ in July? Try 80.
And yes, they were fine with that. No one had an existential crisis over it. No one was screaming âbut Iâm LATEâ because the sun was in charge, not your Google Calendar.
This was seasonal time. Embodied time. Cyclical, intuitive, anti-capitalist time.
It wasnât âinefficient.â It was reverent. The ancients werenât late. The sun was just in a different mood that day.
đ Barton, Ancient Astrology (1994); Hannah, Time in Antiquity (2009)
Diurnal vs. Nocturnal: Time as a Divided BodyÂ
Planetary hours donât just pass through the day like normal time. They split it in half like a dramatic divorce.
Diurnal = sunrise â sunset
Nocturnal = sunset â sunrise
Each half runs through the same Chaldean cycle, but the vibe resets at twilight. Like two timelines running parallel. Siblings who refuse to speak to each other but still share a calendar.
Day and night arenât just hours with different lighting. Theyâre fundamentally different species of time. And this division isnât arbitrary, it echoes deep magical and medical frameworks:
In humoral medicine, itâs hot/dry vs. cold/wet
In alchemy, itâs Sun (active, golden, sulfur) vs. Moon (receptive, silver, mercury)
In ritual logic, itâs:
day = offerings, illumination, manifestation
night = banishings, shadows, unmaking
Modern time is a circle, repetitive, mechanical, looping. But planetary time? Planetary time is a spiral: It comes back around, but never quite the same.
It moves with rhythm, not precision. A cosmic playlist that reshuffles itself every day.
Calculating Planetary Hours: A Ritual in ItselfÂ
Okay, so how do you actually calculate planetary hours? Hereâs the â¨vintage ⨠method:
Find your local sunrise and sunset times.
Divide both the daylight and the night into 12 equal slices (yes, that means two different hour lengths every day).
Assign the first daylight hour to the planet that rules the day (Sunday = Sun, Monday = Moon, etc.).
Continue in Chaldean order until you run out of hours or patience.
Cry softly. Light a candle. Keep going.
Yes, there are apps now. (Yes, I use them. I am weak. Leave me alone.) But back in the day? The math was the magic.
The Picatrix and the Heptameron didnât give you a shortcut. They expected you to observe the sky. To do the calculations by hand. To make eye contact with the sun like a confused but dedicated acolyte.
Because here's the thing: Doing the math was a devotional act. It wasnât just about getting the right planetary hour. It was about staying in communication with the sky.
Planetary hours were never meant to be easy. They were meant to make you look up.
đ Warnock, Secrets of Planetary Magic (2004)
Section Two: A Brief History of This Cosmic BureaucracyÂ
Babylonian Astrology & Chaldean OriginsÂ
Letâs rewind a few millennia to Babylon, where the priest-astronomers were not messing around.
These werenât just your average guys in robes waving at the stars. They were tracking celestial movement like divine memos, because the planets werenât just pretty lights. They were messages. Orders. Omens. Like a Cosmic HR, but make it â¨theocratic.â¨
Astrology wasnât a hobby. It was state infrastructure.
Religion? Check.
Politics? Oh, absolutely.
Weirdly formal moon-based scheduling? Obviously.
Taxes? Probably planetary too.
In this worldview: The planet isnât just a body in space itâs a behavior in the divine. (Yes, this is your cue to spiral into metaphysical dread.)
Planets were gods. Time was sacred. And astrology was how you kept the universe from filing a complaint against your city/state.
đ Rochberg (2004); Pingree, âThe YavanajÄtaka of Sphujidhvajaâ (1975)
Hellenistic Astrology & Greek TimekeepingÂ
Enter: Hellenistic Alexandria, where cultural fusion was the vibe and everyone was trading gods, charts, and metaphysical spreadsheets.
Here, Egyptian, Persian, and Greek systems collided and birthed what we now call horoscopic astrology aka, when math met mysticism and said âwe should start a cult.â
The Greeks, ever the enthusiastic overthinkers, brought some serious tools to the table:
Standardized zodiac charts (we love a labeled diagram)
Planetary dignities (astrological ranking system, very dramatic)
Stoic philosophyâs emotional damage (literally who asked)
But hereâs the best part:
Even as astrology got more technical. More math, more rules, more "align this with Platonic ideals" planetary hours were like: ânah.â
They stayed chaotic, poetic, and ritual-focused. A little piece of Mesopotamian candlelight tucked inside an increasingly bureaucratic cosmos.
Ritual time surviving inside rational math. Messy. Sacred. Beautiful. We love to see it.
đ Hannah (2009); Barton (1994)
The Hermetic Cosmos & Planetary Correspondences
Now we enter the Hermetic era, where things get even more symbolic, and the planets stop being just celestial objects and start becoming moral allegories with opinions.
Hermeticism, born in Roman Egypt, is what happens when Egyptian metaphysics and Greek philosophy get stuck in a room together and start drafting a collaborative universe fanfic. ...Id absolutely read that.
The result? The Corpus Hermeticum. A collection of magical-philosophical texts that describe the cosmos as:
Alive
Tiered like a metaphysical layer cake
Made entirely of planetary forces that double as emotional archetypes
Each planet = a moral vibe. Each sphere = a psychological ecosystem. Itâs less âsolar systemâ and more âspiritual mood board.â
Another little note: â ď¸ Hermeticism â ancient Egyptian religion. â ď¸ Itâs a colonial remix. Created in a cultural contact zone where everyone was swapping gods, cosmologies, and intellectual footnotes like they were PokĂŠmon cards.
Itâs weird. Itâs syncretic theology with a Neoplatonist filter and a flair for cosmic drama.
đ Copenhaver, Hermetica (1992); Fowden, The Egyptian Hermes (1993)
The Picatrix and the Re-Enchantment of Time
Behold: the Picatrix (Ghayat al-Hakim, if youâre fancy or historically accurate) a 10th-century magical encyclopedia written in Islamic Spain that basically said:
âIf you're not timing your spellcasting with planetary math, are you even trying?â
This thing isn like the boss-level ritual timing. It doesnât care if Mercury is in retrograde, you still have to do the math.
No shortcuts.
No vibes-only spellcraft.
Plan your ritual or perish.
The Picatrix is built on deep Islamic philosophical roots, cosmology, metaphysics, logic, the whole sacred architecture. But when it got translated into Latin during the Renaissance?
All that got whitewashed.
Suddenly, your favorite Renaissance magician is a genius⌠âŚbut actually just plagiarizing a Muslim scholar and slapping a Latin name on it.
(If youâve ever read Agrippa and thought âthis man definitely did not cite his sources,â youâre not wrong.)
In the worldview of the Picatrix, time isnât a measurement. Time is a living force. Something you negotiate with. Like a moody deity. Or a cat. Or your landlord.
đ Pingree (1986); Greer & Warnock (2010)
The Heptameron and Planetary Bureaucracy
The 13thâcentury Heptameron turned planetary hours into a literal clerical schedule. Each hour had an angel, an incense, a prayer, a specific filing deadline for your spiritual paperwork.
Itâs magic as administration, a holy Excel spreadsheet.
đâŻPeterson,âŻTheâŻHeptameronâŻofâŻPeterâŻdeâŻAbano; âŻAgrippa,âŻThreeâŻBooksâŻofâŻOccultâŻPhilosophy
Ficino, Neoplatonism, and Planetary MusicÂ
Letâs talk about Marsilio Ficino: Renaissance philosopher, priest, Platonist, astrologer, and full-time â¨vibe curator.â¨
Ficino believed the planets sang. Not metaphorically. Not symbolically. Literally.
According to him, each planetary hour had its own musical mode. A kind of cosmic playlist for the soul.
Feeling Saturnian and melancholic? Donât spiral, chant in the right mode and realign your soulâs playlist.
Venus out of sync? Time to vibe with some harmonic resonance and maybe buy another lute.
Mars got you too hyped? Play something gentle before you start a duel.
In Ficinoâs world, the universe wasnât just moving, it was humming. And your job as a human was to tune yourself to that celestial harmony like some kind of enchanted Bluetooth speaker.
"The heavens sing in silence, and we echo them through ritual. " (Yes, thatâs real. Yes, itâs gorgeous. Yes, I cried.)
This is astrology meets music theory meets spiritual therapy.
đ Kaske & Clark, Three Books on Life; Voss, âFicino and the Magic of Musicâ (2003)
AâŻSystemâŻMadeâŻUp, ButâŻStillâŻBreathingÂ
Yes, planetary hours are stitched together from empire, priesthood, and poetic nonsense. But they can work. Not because theyâre scientifically valid, because they create rhythm, and rhythm breeds meaning.Â
You donât have to âbelieveâ in planetary hours. But if you light a candle at dawn, whisper a planetâs name, and feel the air shift, donât be surprised if time starts whispering back.
This system may be made up, but so are calendars, clocks, and Mondays, and we still let those run our lives.
SourcesâŻ&âŻFurtherâŻReading
PrimaryâŻTexts
TheâŻPicatrixâŻ(PingreeâŻtrans.;âŻGreerâŻ&âŻWarnockâŻed.)
TheâŻHeptameron,âŻed.âŻJosephâŻH.âŻPeterson
Agrippa,âŻThreeâŻBooksâŻofâŻOccultâŻPhilosophy,âŻBookâŻII
CorpusâŻHermeticum,âŻtrans.âŻCopenhaver
SecondaryâŻSources
Rochberg,âŻTheâŻHeavenlyâŻWritingâŻ(2004)
Barton,âŻAncientâŻAstrologyâŻ(1994)
Hannah,âŻTimeâŻinâŻAntiquityâŻ(2009)
Campion,âŻAâŻHistoryâŻofâŻWesternâŻAstrologyâŻVolâŻIâŻ(2008)
Fowden,âŻTheâŻEgyptianâŻHermesâŻ(1993)
Warnock,âŻSecretsâŻofâŻPlanetaryâŻMagicâŻ(2004)
KaskeâŻ&âŻClark,âŻThreeâŻBooksâŻonâŻLife
Voss Angela.âŻâFicinoâŻandâŻtheâŻMagicâŻofâŻMusic.âRenaissanceâŻStudiesâŻ(2003)
Houlding,âŻDeborah.âŻâPlanetaryâŻHours.ââŻSkyscript.co.uk














