In reply to:
If the hours in our days were evenly divisible by 10, I wouldn't mind--that would be an easy calculation.
Been there, done that:
The French Revolutionary Calendar (or Republican Calendar) was officially adopted in France on October 24, 1793 and abolished on 1 January 1806 by Emperor Napoleon I. It was used again briefly during under the Paris Commune in 1871. The French also established a new clock, in which the day was divided in ten hours of a hundred minutes of a hundred seconds - exactly 100,000 seconds per day.
http://webexhibits.org/calendars/calendar-french.html
Bingley
