Inconsistent time formatting

I don’t know if this issue popped up recently or that it is already present longer, but I am seeing a 12 hour time format in the cards in Home-assistant whereas everywhere else I get the 24 hour format that I want. I even tried setting my browser to Dutch, checken Timezone in bother the raspberry and in Home-assistant and everything appears to be OK except for the silly 12 hour format in the cards.

Any tips on how to change this?

AFAIK the issue is known an related to a recent change in the chart drawing software (was server-side rendering before, is local rendering using chart.js now).