Cosmofunk

Planetary Hours & Moon Calendar

Which planet rules this hour, and where the Moon is in its cycle

◎Observer

Sunrise and sunset come from your latitude and longitude. Everything updates as you change them.

⏲Local time

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☼Current planetary hour

 
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☾The Moon now

☼The planetary dial

⏳The 24 hours of

The day runs from sunrise to sunrise. Daytime and night-time are each cut into twelve equal hours, so planetary hours are longer than 60 minutes in summer days and winter nights, shorter otherwise.

☾Moon calendar

Each day shows the Moon’s phase and zodiac sign at local noon. Gold text marks the four main phases; the cyan bar marks a void-of-course stretch. Tap a day for details and its planetary hours.

ⓘAbout

Planetary hours. Each hour is ruled by one of the seven classical planets in the “Chaldean” order (Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon). The first hour after sunrise belongs to the planet of the day, which is why Sunday is the Sun’s day, Monday the Moon’s, and so on.

Void of course. The Moon is void of course from its last exact major aspect (to the Sun through Saturn) until it enters the next sign. Tradition advises against starting important things then, and favours rest and review.

Sunrise and sunset use the standard 0.833° below the horizon and are typically within a few minutes of published tables. Times use a compact model (1900–2099). The uses listed are traditional, offered for reflection.

About this tool

Planetary hours split the day from sunrise to sunset, and the night from sunset to sunrise, into twelve unequal hours each. The hours are ruled by the seven classical planets in Chaldean order, starting with the ruler of the weekday. The Moon calendar adds phases, signs and void-of-course periods.

Frequently asked questions

How are planetary hours calculated?

The time between sunrise and sunset is divided by 12, and so is the night. Each hour is assigned a planet in the order Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon, starting with the day ruler.

What does void of course mean?

The Moon is void of course between its last major aspect in a sign and its entry into the next sign. Tradition advises against starting important things then.

Why do the hours differ from 60 minutes?

Because they are fractions of the actual daylight or night, so they are longer in summer days and winter nights.

Astrology is a symbolic tradition offered for reflection and entertainment, not a prediction or professional advice.