Chris raised his hand and said "The priest used a lunar calendar consisting of 13 months, each being 28 days long, plus one intercalary day. the astology they used was they envisioned the entire Universe in the form of a tree, whose roots grew deep into the ground and whose branches reached high into the Heavens. The Celtic people eventually designated a tree to each Moon Phase in their calendar in accordance with its magical properties. Therefore, the Celtic Zodiac is based upon the cycle of the Moon, with the year divided into the 13 lunar months established by the Druid religion." he said as he quicky memorized from his textbook