The document summarizes the French Revolutionary Calendar that was created during the French Revolution to replace the old Gregorian calendar. Some key points: - The new calendar had 12 months of 30 days each plus 5-6 end-of-year days. Months and days were named after natural elements and agricultural cycles instead of Roman gods or saints. - Years were counted from 1792, the first year of the French Era, rather than from the birth of Christ. The current year is year 221 of the 3rd century of the French Era. - The calendar had decimal time with 10-hour days divided into 100 minutes and 100 seconds each. - Issues arose as the calendar did not align with