History of Astronomy: Items: Calendars, Time and Chronology

• Horology - The Index
• A Walk Through Time: Evolution of Time Measurement
  From ancient calendars to the "atomic" age, including a bibliography
• Time: General
  Royal Greenwich Observatory Information Leaflet No. 27
• Calendars: General
  Royal Greenwich Observatory Information Leaflet No. 50
• Links to Web calendar resources / Calendar Bibliography
• Calendars by Anne Rego
• Calendars by Michelle Satorhelyi
• Focusing on Words
  This site will be presenting "time systems of the world, past and present", and starts with a combination of the Julian and Gregorian calendars
• Date of Easter
  Royal Greenwich Observatory Information Leaflet No. 57
• Leap Years (Julian vs. Gregorian calendar)
  Royal Greenwich Observatory Information Leaflet No. 48
• The Year 2000 AD
  Royal Greenwich Observatory Information Leaflet No. 52
• Perpetual Calendar
  An historically oriented calendar
• Perpetual Calendar using Unix cal command (Julian Calendar for dates before 3rd September 1752, and Gregorian for all subsequent dates)
• WWW Calendar Generator v2 (Perpetual Calendar)
  (I haven't tested for these simple calendars wether they work correctly for past centuries! W.R.D.)
• Julian Day Calendar
  including some important Julian Dates in the history of astronomy
• Online Julian date conversion
• Programs for historical chronology
• Gregorian Calendar
• Tomar Grigorieann havitenakan, 1584
  (A Gregorian calendar for all eternity)
• Mesopotamian calendar
• Chinese Calendar
• Persian Calendar
• American University file archives
  • Miscellaneous [Catholic] Files
    Including catholic calendars
• Calculation of the Ecclesiastical Calendar
• Notes on the Orthodox Easter and the algorithm by Gauss
• The Sun, the Moon, and Happy New Year in Japan by Steve Renshaw
• Moon Months
• Online Julian date conversion
• Programs for historical chronology
• Calendars and Chronology WWW links
• Reference: Calendars WWW links from Yahoo

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