Could time be decimilsed?

It technically could, but it would also lead to many other adjustments in the World e.g. The conversion of the latitudal and longtudal navigation grids and moving of the time zones.

Anything man designed ie time itself can obviously be changed by man. However with regard to decimalising time it would be more trouble than it would be worth.

Sure, 10 hours per day, 100 minutes per hour, 100 seconds per minute, each second being a little shorter, about .86 times the current length of a second. 100,000 seconds per day instead of 86400.

There would still have to be 365.24....days per year though. Resetting clocks does nothing to the sun's rise and set each day.

BUT, as someone who grew up in the 50's and 60's learning the new "metric system" because that's what the future was going to hold instead of quarts, pounds, and inches, I'd say that it will take even longer for people to adjust to a 10 hour day where the work day is 3.33333 hours with a 20.83 minute lunch time (8 hours and 1/2 hour currently), or television shows that last for 41.6 minutes.

While we CAN, we probably never will.