the Gregorian calendar—what we use today—is an improvement of the Julian calendar. The Mayan Calendar is one of these calendars that has withstood the test of time. Although it has not been ...

Scholars show how multiple planet movements tie into the 819-day Mayan calendar. The 819 days of the calendar must be viewed across a 45-year time period to fully understand. The movements of all ...

How he found the solution of the mystery of the ancient Mayan calendar, the oldest time-counting system in the world, was explained yesterday by Dr. H. J. Spinden of the Peabody Museum in an ...