Calendars and Timekeeping

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  • TimeandDate.com

    http://www.timeanddate.com/

    Specialized in providing date calculators, world clock, calendars, day and night world map, digital clock and much more to individuals and websites. TimeandDate.com »

  • Astronomers at the Istanbul Observatory

    http://www.math.nus.edu.sg/aslaksen/calendar/islamic.shtml

    NUS has worked on many calendars but this website shows the mathematical Islamic Calendar, calculation of dates, visibility of moon and its tools, etc. Astronomers at the Istanbul Observatory »

  • CalSky

    http://www.calsky.com/

    Take advantage of daily personal celestial calendar and import events into Outlook or any personal planner software. Explore the eclipses in solar system, the phases of Sunrises or Moon and their shadows. CalSky »

  • Britannica

    http://www.britannica.com/

    Explore the geography around and look into popular topics, quizzes, image galleries, and see what the experts have to say. Browse Britannica and understand the world and environment around. Britannica »