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Learning The Celtic Tree Months

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The Celtic tree calendar has 13 lunar divisions named after trees, which was used by the Celts and existed before the Roman calendar. This calendar is based on the concept that the ancient alphabet of the Celts, the ogham alphabet, represented a tree. In this calendar, each month has fixed dates, and doesn’t follow the normal waxing and waning cycle.


Here is the layout of the Celtic calendar:


  • Beth (Birch) December 24 to January 20
  • Luis (Rowan) January 21 to February 17
  • Nion (Ash) February 18 to March 17
  • Fearn (Alder) March 18 to April 14
  • Saille (Willow) April 15 to May 12
  • Uath (Hawthorn) May 13 to June 9
  • Duir (Oak) June 10 to July 7
  • Tinne (Holly) July 8 to August 4
  • Coll (Hazel) August 5 to September 1
  • Muin (Vine) September 2 to September 29
  • Gort (Ivy) September 30 to October 27
  • Ngetal (Reed) October 28 to November 24
  • Ruis (Elder) November 25 to December 22
  • December 23 is not ruled by any tree for it is the traditional day of the proverbial “Year and a Day” in the earliest courts of law.


Beth, the Birch month, is a time of regeneration and new projects. This is the perfect time to go back to the light once more as the Sun makes a comeback. The Birch tree is the first tree to grow back after a forest fire. This month is the best for spells related to creativity, healing, protection, and fertility.



Luis, is the Rowan month associated with Brighid. This is the perfect time to perform initiations and for spells of power and success.


Nion, is the Ash month. Spells that focus on the inner self, spiritual journeys, and prophetic dreams. The most productive tools are made from the branches of the Ash tree.

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Tree Of Life Earrings from The Moonlight Shop


Fearn, is the Alder month. It is at this time, Spring time, when Alder flourishes and grows on the riverbanks, bridging the earth to the heavens. This is the perfect time to make spiritual decisions and to perform divination. The Alder is commonly used in Faerie magick.


Saille, is the month of the Willow. This month is the month for spells of growth, healing, and magick related to the mystery of women.



Uath is the month of the Hawthorne. It is the time of fertility, masculinity, sexual energy, and fire. This is the perfect month to make a baby with your partner since male potency is on an all time high. This is the month of magick related to business decisions and professional connections.


Duir is the month of the Oak. The Oak is a mighty tree that towers over the other trees and is sacred to the Druids. Cast spells involving good luck and money.

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Tree of Life Necklace from The Moonlight Shop


Tinne is the month of the Holly. The Holly takes over the Oak when it starts to fall, and is often used in spells of protection. A sprig of holly in your home keeps your family safe.



Coil is the month of the Hazel. This is the month of wisdom and protection and magick concerning these areas are best done at this time.


Muin is the month of the Vine. This is the time of great abundance. Spells concerning happiness and great passion are best done at this time. This is the perfect time for your ambitions, goals, and dreams.


Gort is the month of the Ivy. The Ivy is a plant that reminds us how life goes on and there is time to be reborn. This is the perfect time for banishing spells, like to banish negativity from your life. Avoid the things that are bringing you negativity and work on improving yourself.



Ngetal is the month of the Reed. This is the time of the Elm moon, and is the time when the dead are being summoned to the Underworld. This is usually the time when seances are held, and is also the perfect time for divination and scrying.


Ruis is the month of the Elder. This is the time of endings. This is the perfect time for spells related to renewal and new beginnings. You can also use Elder in Faerie magick.



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