I think it must be imperial. Its not multiples of 10 (ok seconds are).

24 hours in a day! 60 minutes in an hour. it must be imperial.

If it were metric there would be 100 hours in a day, 100 minutes in an hour and 10 seconds in minute.

I can’t work out what a metric second would be but when they change it to metric, our wages are in for a shock!

Well, I’m on a train now, so if you are sitting at home reading this, then you are ageing faster than me. But are you ageing imperially or metrically?

The Motherland introduced metric time in 1793.

But it was rather fiddly, invited ridicule from the Brits (plus ça change, plus c’est la même chose…) and never caught on. The only traces you would hear of it these days are Émile Zola’s ‘Germinale’ and Lobster ‘Thermidor’ both of which are named after their cranky secular names for months.