frdate is a commandline tool for printing French Revolutionary Calendar dates and Decimal Time.
See:
$ frdate It's 6:44:30, today is the 8th of Nivôse in 233. It's the day of the Manure. $ date # standard gregorian calendar for comparison Sa 28. Dez 15:27:46 GMT 2024
This tool was written for fun and is not intended for historic or scientific usage.
Scientific decimal time will not be supported.