Moon Magick and the Celtic Tree Calendar are very much intertwined, as you will see here. Although I have not explained all there is to know, I hope to do this in the future. The Celtic Tree Calendar has 13 months and 28 days within each month - and an extra day to its own at the end of the thirteen months. For more information on when to cast spells in relation to the moon click HERE.
Birch Moon [Beth] Dec 24 to Jan 20 Moon of inception and beginnings Planet: Sun Symbol: Eagle or Stag *
Ash Moon [Nion] Feb 18 to Mar 17 Moon of waters Planet: Neptune Symbol: The Trident ***
Rowan Moon [Luis] Jan 21 to Feb 17 Moon of vision and astral travel Planet: Uranus Symbol: Green Dragon **
Alder Moon [Fearn] Mar 18 to Apr 4 Moon of unity and self guidence Planet: Mars Symbol: The Pentacle ****
Hawthorn Moon [Uaht] May 13 to Jun 9 Moon of restraint and hinderance Planet: Vulcan Symbol: The Chalice ******
Willow Moon [Saille] Apr 5 to May 12 Witches' Moon. Moon of balance Planet: the Moon Symbol: The Serpent *****
Oak Moon [Duir] Jun 10 to Jul 7 Moon of strength and security Planet: Jupiter Symbol: The Golden Wheel *******
Hazel Moon [Coll] Aug 5 to Sept 1 Crone Moon. Moon of the wise Planet: Mercury Symbol: The Rainbow Fish *********
Moon of Holly [Tinne] Jul 8 to Aug 4 Moon of polarity Planet: the Earth Symbol: The Flaming Spear *********
Vine Moon [Muin} Sept 2 to Sept 29 Moon of celebration Planet: Venus Symbol: The Swan ***********
Ivy Moon [Gort] Sept 30 to Oct 27 Moon of bouyancy and resilence Planet: Persephone Symbol: The Butterfly ***********
Reed Moon [Ngetal} Oct 28 to Nov 24 Moon of home and hearth Planet: Pluto Symbol: The Stone ************
Elder Moon [Ruis] Moon of completeness Nov 25 to Dec 22 *************
December 23 [one day only] Gemstone: black pearl Plant: Mistletoe
Credits: Some information will come from Edain McCoy books Moon Magick andWitta: An Irish Pagan Tradition : Kisma Stepanich's Faery Wicca Books I, II