History of the Calendar

Barbara J. Feldman

Without hardly a thought to the calendar itself, we begin another year. Yet the development of the calendar was a major advance, based on astronomy as well as religion. The Gregorian calendar we use today was created in the 1580′s by Pope Gregory XIII. Want to learn more? Start your new year here. [Editor's Note: An updated version of this topic can be found here: History of the Calendar]

  • Aztec Calendar4 stars

    The Aztec Indians of the fifteenth and sixteenth century had one of the most advanced civilizations in the Americas. Although they were destroyed by the conquering Spaniards in 1521, they left a lasting mark on Mexican culture. The Aztec used two independent calendars. The xiuhpohualli was a solar calendar that described the days and rituals related to the seasons. It had 365 days. The tonalpohualli, or day count, was a sacred calendar with 260 days. Its purpose was to divide the days among the various gods.

  • A Walk Through Time5 stars

    "In the 1840's a Greenwich standard time for all of England, Scotland, and Wales was established, replacing several 'local time' systems. The Royal Greenwich Observatory was the focal point for this development because it had played such a key role in marine navigation based upon accurate timekeeping. Greenwich Mean Time (GMT) subsequently evolved as the official time reference for the world and served that purpose until 1972." This fabulous site, produced by the National Institute of Standards and Technology, presents both the history of timekeeping and a peek at its current state. If you want to coordinate your Windows-based computer clock to the NIST clock, you can download a program to do so over the Internet.

  • Honorable Mentions

    The following links are either new discoveries or sites that didn't make it into my newspaper column because of space constraints. Enjoy!


    Cite This Page

  • Feldman, Barbara. "History of the Calendar." Surfnetkids. Feldman Publishing. 6 Jan. 1999. Web. 1 Aug. 2014. <http://www.surfnetkids.com/resources/calendar99/ >.


  • About This Page

  • By . Originally published January 6, 1999. Last modified July 10, 2014.

  • Calendar: Humanity s Epic Struggle to Determine a True and Accurate Year
    Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
    by David Ewing Duncan
    (Hardcover)
    Price: $5.75

    2014 History: This Day in History boxed calendar
    2014 History: This Day in History boxed calendar
    by History Channel
    (Calendar)
    Price: $7.00

    Mapping Time: The Calendar and Its History
    Mapping Time: The Calendar and Its History
    by E. G. Richards
    (Paperback)
    - Usually ships in 24 hours
    Price: $29.95