[TacoSteemers]

Unfortunately the browser implementations of the HTML5 datepicker only make sense for an audience that understands the US date notation. They can't be configured, as far as I know.

[b3orn]

What? The html date picker just uses the system date picker. And the value is formatted as yyyy-mm-dd when you submit it, that's not the US date format.

[TacoSteemers]

After reading your reply I checked again and it does indeed work as expected on Windows at least, so that is great news to me.