Nothing, nothing at all, is more abhorrent than someone willing to make a change only to leave more work for someone else to clean up!

Yes, one universal time zone, used universally! Bravo, finally, indeed.

But with metric time:

• 1 metric hour = day/25

• 1 metric time minute = day/1000 = hour/40 = 1 mday

• 1 metric time second = metric minute/1000 = 1 µday

And while we are at it, since this is all about rotation, lets fix that too:

• 1 metric rotation degree = rotation/100 = 1 centi-rotation

• 1 metric rotation minute = rotation/1000 = 1 milli-rotation

• 1 metric rotation second = metric degree minute/1000 = 1 µrot

Notation: instead of '°', metric degrees use a filled circle '•'.

Now we have conceptual correspondence between 1 minute of time and 1 minute rotation of the Earth.

If you know your metric longitude, you know the local time shift, and vice versa.

Finally, a metric "milette" distance is defined as 1/1000 of the Earths circumference, or ~40km. The Earth's surface moves 1 millete distance -> in 1 minute of time -> over 1 minute of rotation

Ok, open for suggestion period.