The term Celtic Astrology is used to refer to the "tree calendar" invented by Robert Graves, freely based on the historical Ogham script, described in The White Goddess (1952). It has no relation to the historical Celtic calendar. Portrait of Robert Graves (circa 1974) by Rab Shiell Robert von Ranke Graves (July 24, 1895âDecember 7, 1985) was an English scholar, best remembered for his work as a poet and novelist. ... Ogham (Old Irish Ogam) was an alphabet used primarily to represent Gaelic languages. ... The author and poet Robert Graves study of the nature of poetic myth-making, The White Goddess, first published in 1948, and revised, amended and enlarged in 1966, represents a tangential approach to the study of mythology from a decidedly idiosyncratic perspective. ... 1952 (MCMLII) was a leap year starting on Tuesday (link will take you to calendar). ... The term Celtic calendar is used to refer to a variety of calendars used by Celtic-speaking peoples at different times in history. ...
References
Peter Berresford Ellis, The Fabrication of 'Celtic' Astrology, The Astrological Journal (vol 39. n. 4, 1997)
The Celtic otherworld, the faerie realm, had its own river of time that constantly intersected with the flow of time in this world, changing the perceptions of the humans who were touched by its spirit.
In Celtic time we would not only experience what we could expect or hope of the future but also relive things that had been part of the past as the river of time flowed again through a place it had travelled to before.
There are no men or women in the Celtic pantheon of heroes who are not able to speak their wisdom and their feelings through song or poetry, no matter how great their prowess in battle or their skill in politics and law.
To understand modern astrology, it is therefore necessary to trace the way in which an originally mythical picture of the cosmos picks up natural-scientific, medicinal, and psychological knowledge, as well as nature-mystical and spiritual ideas, and forms all of these individual areas into a unique world view.
Astrology is thus thoroughly capable, by nature, of comfortably adapting its world view to Judaism, Christianity, and Islam; for the creator god of these religions, who created the world, also created the heavenly bodies and their gods.
In many astrology schools as well, astrology is taught by way of esoteric doctrines, whereby it is often just a matter of very general references or fragmentary allusions to "karma" and "rebirth." A binding form of esoteric astrology in the form of a clearly defined doctrine is hardly discernable here.