Climaterical Periods

Every 7th and 9th year in a Nativity, supposedly brought about through the influence of the Moon in its position in the Radix. The Moon squares her own place by transit every 7th day, and by direction every 7th year; and trines it every 9th day and year. Thus the climacterical periods occur at the ages of 7, 9, 14, 18, 21, 27, 28, 35, 36, 42, 45, 49, 54, 56, and 63 years. The most portentous are those of the 49th and 63rd years, which are doubly climacterical, 7×7 and 9×7. When evil directions coincide these are generally deemed to be fatal. The 63rd year is called the Grand Climacteric, and the general presumption is that more persons die in their 63rd year than in any other from 50 to 80.

DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.