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moon 33The 33 year lunar cycle occurs every 33 years. The next 33 year lunar cycle will begin in 2021 and will end in 2054. Is the 33 year lunar cycle useful for predicting eclipses?The 33 year lunar cycle occurs every 33 years. The next 33 year lunar cycle will begin in 2021 and will end in 2054. Is the 33 year lunar cycle useful for predicting eclipses?