Dear David F,

I didn't mean a day to be 10 hours.
But two periods of ten hours which
is equal 20 hours.

As for your explanation - I will leave
that to the computer literate to digest
and respond.

A year is made up of 365 daylight periods with an extra day every four years plus, to adjust to one annual circuit around the sun. How do you accomodate this in decimal time? How many days do you have in a decimal year? How do you calibrate longitudal gradients on the Earth in decimal time? How many degrees in a circle? Unless you had 5 day weeks included a one day weekend and 10 hour days no am or pm etc Too much to change and exceptions to be made.

Dear Philo,

You haven't read the original posts.
Where your questions are answered.
Please do so.

As for latitude and longitude -
that is a topic for another discussion.

Ummm,

Don't think philo is wrong here.

As I alluded, astronomical and angular measurements are critical.

Why shouldn't they be explicit? Why shouldn't students learn them?

Major functions of the local cycles, adjustments for rounding, precession or tidal epicycles etc.

Our computers already use the completely ratonal system of counting seconds since 1981. just a little unwieldy.

Still maintaining that a system based on angular measurements is the way to go. My (p/q)/100 Pi radians of break time relative to M21) is up now, back to the rats.

Rusty

I think Philo's right too - the difference between going metric on weights/distances and time is that weights and distances are completely conceived and calibrated by man.

On the other hand, the way we structure time is fundamentally defined by our relationship with nature - ie hours, minutes and seconds are subdivided into the time it takes the earth to spin through one full rotation on its axis. And a year is defined by the time it takes the earth to do one full rotation around the sun and pass through all 4 seasons. It turns out that the earth spins on its axis about 365.25 times (ie days) in the time it takes to do one full circuit around the sun (ie a year). 365.25 does not neatly fit into the decimal numbering system and it can't be forced to fit.

As the above describes, in nature there are cycles within cycles that simply do not conform with the decimal numbering system. And our concept of time is interwoven with nature.

As opposed to time, weights and distances are a function of man only because it is inconvenient for us to use the natural units of weight. It would not be convenient to use the Hydrogen atom with one proton and no neutron as a unit of weight or the radius of earth at the equator as the measure of distance. However, it would be as legitimate to use those measures as units of weight and distance as it is to use the time for earthly rotation and revolution for the units of time.