1910 New Catholic Dictionary
Name applied to each of the 19 numbers representing the cycle of lunar years into which Meton (432 B.C.) divided the calendar subsequent to his discoyery that after 19 solar years had elapsed the new moon would occur on the same days in the years indicated by identical numbers. They are so called because the number for each current year was inscribed in gold on an Athenian temple pillar.
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Entry for 'Number, Golden'. 1910 New Catholic Dictionary. https://www.studylight.org/dictionaries/eng/ncd/n/number-golden.html. 1910.