Definition of golden number in English:

golden number

noun

  • The number showing a year's place in the Metonic lunar cycle and used to fix the date of Easter for that year.

    • ‘Tables had been brought into use in 530 in which each year was given a golden number indicating its place in the cycle, most possibly so named because they were marked in gold in medieval calendars.’

Pronunciation:

golden number

/ˈɡōldən ˈnəmbər/