I've only heard "metric time" refer to strictly powers-of-ten seconds (kiloseconds / megaseconds / ...), not your fractions of a day. Have you seen the French

I've only heard "metric time" refer to strictly powers-of-ten seconds (kiloseconds / megaseconds / ...), not your fractions of a day. Have you seen the French revolutionary decimal time? It's closer to your proposal but with 10 hours/day instead of 25, for more consistency.