• Why did a Jewish scientist create the Rules for the Astrolabe?  
   
  What was the Y2K problem?

  What do calendars have to do with latitude?
   

Learn More About Calendars
 A Wonderful on-line Exhibit on Calendars

Basics of Calendars  A basic college-level introduction  Multi-Calendar Converter	Calendar Zone  A very useful guide to internet sources on calendars.
Hebrew Calendars Explained in English |  Calendarios hebreos (en Español) How Hebrew calendars ( a compromise between lunar and solar calendars) are calculated. Plus a simple program based on Karl Gauss's algorithm for determing the date of Passover. Hebrew Calendar Converter	Basics of the Muslim Calendar  Has a free program to calculate lunar crescent sighting  Muslim-Christian calendar conversions
Chinese calendar conversions Contains a converter for Chinese lunar calendar into solar calendar. Japanese Lunar Calendars And no, they are NOT the same!	Lunar to Solar Conversions for Christian Calendars Also converts in reverse, from solar to lunar !
Persian Calendars  An introduction to the other major solar calendar.  Persian Calendar Conversions	England did not adopt the accurate solar calendar until 1752!  Today According to Olde English Calendar  See how far off we would be Find a Date in the English Calendar Medieval English Calendar
Maya Calendars  An excellent introduction to the Mayan calendar with a converter at the bottom of the page  Maya Calendar's Astronomy	Aztec Calendar  A wonderful visual explanation of the Aztec Calendar (and today's date in Aztec time)  Native North American Names for Moons

 

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