It’s the whole Anglosphere. We do it, as well as imperial measurements, to give the finger to Napoleon and his metric 10 hour long day system.

But 24-hour time is not decimal, isn't it what you guys like?

It’s not the whole Anglosphere.

24 hour time is used extensively in the UK. For example, all public transport uses 24 hour times here.

I knew for the imperial units but not this. This country ... let's say it always amaze me.

They use US customary, not imperial, they're slightly different sets of units.

https://en.wikipedia.org/wiki/United_States_customary_units

> Some advocates of the customary system saw the French Revolutionary, or metric, system as atheistic. The president of an Ohio auxiliary of the Institute wrote that the traditional units were "a just weight and a just measure, which alone are acceptable to the Lord". His organization later went so far as to publish music for a song proclaiming "down with every 'metric' scheme".

Ooh that explains a lot.