Add uncommon date / time based input types (like week, month, etc)?

[bryanbraun]

There are some new input types with interesting native UI's that haven't been included here, like week, month, date, datetime, etc. We could include these on poor man's styleguide if we want. I'm not sure how practical or important they are (browser support is inconsistent), but perhaps there's an argument to include them for the sake of being comprehensive.

Here's an example of some: http://html5tutorial.info/html5-date.php