from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A year in the old Julian calendar (which started on different dates).
  • n. An "average year" of 365 days and six hours, used for convenience of quick calculations, as opposed to a calendar year of either 365 or 366 days, and a mean tropical year of 365 days, 5 hours, 48 minutes and 45 seconds.


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