[speedgoose]

But the webdev has to solve this problem. Users with wrong locales and not aware of that are not very uncommon. I would also love the US to fix their stupid date format and even fully adopt the metric standard but sometimes you have to compromise and write code instead.

[berkes]

WRT dates, there's no "metric" standard. Not really. E.g. Belgium commonly uses DD/MM/YYYY whereas the Netherlands uses DD-MM-YYYY. Both use "metric standard" for lengths, weights etc. Same with currencies: "13,37 €" vs "€ 13,37" vs "€13,37", all depending on where in Belgium you are from, vs Dutch in the Netherlands. It's an utter mess.

Which is another reason to let browsers - the user agents - deal with this. There's absolutely no way a lonely JS dev, or even a community around something like MUI to get all this right. And they don't. There's always something broken for me with these custom elements. If it's not some US-centric web-app enforcing their MM/DD/YYYY format, then it's some "ignorant" dev being unaware that in Europe in many countries decimal separators are a comma, or that in Thailand the current year is 2566 and that this is not "too far in the future".

[speedgoose]

My bad, seems like the metric system is an old thing:

https://en.m.wikipedia.org/wiki/Metric_system