What is the Babylonian Calendar?

Babylonian timekeeping helped shape later Near Eastern calendrical practice. Month starts were tied to the Moon, while intercalation kept the calendar from drifting too far from the agricultural seasons.

How the calendar is structured

Lunar months coordinated with the solar year through intercalary months.

Where and why it is used

Region: Mesopotamia. Primary context: Historical chronology and study of Mesopotamian culture.

History and development

The system belongs to the Ancient layer of the archive. Its origin is summarized as Ancient Mesopotamian tradition. CalculatorWiser separates historical reconstruction, religious observance, civil use, and modern technical standards so different systems are not treated as though they all work the same way.

Visual reference gallery

Conversion and accuracy notes

Some calendar systems can be converted deterministically with modern algorithms. Others depend on observation, local authority, historical reconstruction, or regional practice. CalculatorWiser marks those distinctions rather than presenting uncertain dates as exact.

Research trail

This entry is part of the research-backed World Calendar Archive. Primary research anchor for this entry: Historical chronology references.