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Astrology, By Witchipedia

Planetary Days in Astrology & How to Use Them

Updated on:


Written by: Dawn Black (Witchipedia)


Reviewed by: Tina Caro

Scientifically speaking, a planetary day is the amount of time it takes for a planet to do a complete revolution on its axis. For example, the Earth takes 24 hours of 60-minute intervals to complete a full revolution or day. Each planet has its own revolution speed and thus its own day length.


Each day of the week is associated with a specific planet in astrology, offering unique energies and opportunities for spellwork and ritual.

Sunday is linked to the Sun, making it ideal for spells related to confidence, success, and personal power, while Tuesday, ruled by Mars, is perfect for rituals involving courage, strength, and assertiveness.

Utilizing planetary hours within each day allows witches to harness even more specific planetary energies, aligning their intentions with the most potent celestial influences.

Planetary days and hours can greatly enhance the effectiveness of your magical practices, enabling you to tap into the cosmic forces that resonate with your intentions and desires.

Planets and Days

Esoterically speaking, the term planetary day refers to the planetary correspondences of each day of the week. 

These planetary days consists of 24 planetary hours, but rarely consist of 60 minutes. The planetary day begins at the moment of dawn and continues to sunset. The hours in this period vary in length according to the length of this sunlight period.

There are 12 hours of equal length. To find out how long they are, you must figure out how many minutes of daylight there are and divide by 12. The planetary night hours are figured similarly from the moment of sunset to the following sunrise.

The first hour of each day is the planetary hour of the day, on Saturday, it is Saturn, for example, then the hours cycle through the seven planets that were known to the ancients, according to the [sequence]] (Saturn – Jupiter – Mars – Sun – Venus – Mercury – Saturn) and back again to the original planet in 8 hours and so on.

Using Planetary Days and Hours

Planetary Days and hours are useful in for horary astrology and also in herbal lore, alchemy, and spagyrics as well as for spellwork and mundane actions.

In the case of herbal lore, for example, an herb that corresponds to a specific planet is more effective when gathered on the appropriate planetary day and hour. Spellwork and other actions are best undertaken in the proper planetary day and hour. Talismans, sigils, elixirs and similar are said to be more effective when created during the appropriate planetary day and hour.

You can find a convenient calculator for planetary hours at

About Morningbird (Witchipedia's Founder)

I am a homesteading hearth witch who grew up along the shores of the Hudson River and has lived among the Great Lakes for the past 20 years. Together with my musical husband and youngest child, I steward a one-acre mini homestead with herb, vegetable and flower gardens, chickens, ducks, geese and rabbits, and areas reserved for native plants and wildlife. 

I have three children; two are grown, and I have been practicing magick alone and with family and friends for over 30 years.

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