How are planetary hours calculated?

Day hours span from sunrise to sunset, and night hours from sunset to sunrise, so their length varies by season and latitude. Each hour is assigned a ruling planet in the Chaldean sequence. Mystra calculates them automatically for your location.

✦ The Chaldean Hours ✦

Planetary Hour Oracle

Each hour of the day is ruled by one of the seven classical planets. Discover the ruler of this hour and how to align with it.

For entertainment, spiritual reflection, and creative inspiration only. This content is not a substitute for professional medical, psychological, legal, or financial advice. Always consult a qualified professional for important decisions.

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The Current Hour Is Ruled By

Saturn

Serious, structured, enduring. A time for discipline, boundaries, and deep work.

Your intention for this hour (optional)

This simplified calculation uses equal hours from local midnight and the day's ruling planet as the first hour. Traditional planetary hours use sunrise and unequal day/night hours; this approximation is close enough for most reflective purposes.

Frequently Asked

Questions & Answers

Planetary hours divide each day and night into 12 unequal hours, each ruled by one of the seven classical planets. The first hour of the day sets the day's ruler. They are used in magical and ritual timing to align actions with planetary energies.