What Is the World's Oldest Calendar? Discovering the Warren Field Calendar
Explore the world's oldest calendar, the Warren Field calendar from 8,000 BC, used by early hunter-gatherers to track lunar months and seasons.
Which Is the Oldest Calendar: Sumerian Lunar-Solar Calendar Explained
Discover the oldest known calendar, the Sumerian lunar-solar calendar from Mesopotamia dating back to 21st century BCE.
Was Year 1 AD a Real Historical Year? Understanding the Gregorian Calendar Start
Explore the reality of Year 1 AD and its significance as the starting point of the Gregorian calendar with historical evidence.