What is the French Republican Calendar?

The Republican calendar was created to break with ancien-régime conventions and used nature-themed month names. It was used officially for roughly a decade before being abandoned.

How the calendar is structured

12 months of 30 days plus complementary days; ten-day weeks.

Where and why it is used

Region: Revolutionary France. Primary context: Historical study of the French Revolution.

History and development

The system belongs to the Early Modern / Revolutionary layer of the archive. Its origin is summarized as 1793 official adoption. 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: Library of Congress.