Cycles used in chronology are three: The solar cycle, the lunar cycle, and the cycle of indiction.
Hence the term golden number, still found in our almanacs, which denotes the year of the lunar cycle.
When the golden number is 19, that is to say, in the last year of the lunar cycle, the supplementary month contains only 29 days.
By means of the lunar cycle the new moons of the calendar were indicated before the reformation in 1582.
Thus, fourteen was the golden number for 1837, being the fourteenth year of the lunar cycle.
He also mentions the lunar cycle, and uses the dominical letter with the kalends of several years.
By means of the lunar cycle the new moons of the calendar were indicated before the Reformation.
lunar cycle, a period of time at the close of which the new moons return on the same days of the year.
If the one number 1,260 stood alone, the fact that it was so close a lunar cycle might easily be ascribed to a mere coincidence.