I know that at the time of this writing only Opera supports a browser UI for
<input type="date" name="mydate">
and maybe my attempts to localize this field have been met with frustration because niceties like localization have not yet been included in their implementation, but I don't even see mention of it in the HTML5 spec. Is there a way that localization should be specified? Should I do lang="fr" on a parent element?
Some notes on the implementation of the site in question:
From what i know, the thinking behind what we do in Opera (full disclosure: I work for them) is that the date picker is almost an extension of the chrome, a browser-native control. As such, it will be localised according to the language of the browser, rather than the language of the page being viewed.