> It’s also worth pointing out that as far as I know efforts to 10-base time have failed. Sure, the French Republican Calendar "failed". But it "failed" less s

> It’s also worth pointing out that as far as I know efforts to 10-base time have failed. Sure, the French Republican Calendar "failed". But it "failed" less so because it was 10-base. Napoleon abolished it because of 2 main flaws: (a) The decree that formalized the calendar contradicted itself when it came to determining leap years. (b) The beginning of the year/era was based on commemorating a historical event rather then observing the beginning of Winter or Spring. Which would make adoption of the calendar hard. https://en.wikipedia.org/wiki/French_Republican_calendar https://en.wikipedia.org/wiki/French_Republican_calendar Then again, the traditional Chinese timekeeping was/is partly 10-based. This system developed in it's own right separate of systems that emerged throughout Europe. https://en.wikipedia.org/wiki/Traditional_Chinese_timekeeping https://en.wikipedia.org/wiki/Traditional_Chinese_timekeepin... Time keeping is a "hard problem" anyway. As a historian, dating a historic document can be a daunting task when you're confronted with different calendars.