The type="date" is not an actual specification at this point. It is a concept Google came up with and is in their whatwg specifications (not official) and is only partially supported by Chrome.
http://caniuse.com/#search=date
I would not rely on this input type at this point. It would be nice to have, but I do not foresee this one actually making it. The #1 reason is it puts too much burden on the browser to determine the best UI for a somewhat complicated input. Think about it from a responsive perspective, how would any of the vendors know what will work best with your UI say at 400 pixels, 800 pixels and 1200 pixels wide?