Wow, that component's approach is a nice idea. That component ALSO handles keyboard changes to the date.

That's actually the same UI as the Windows 7 date/time picker :)

I don't know about him, but that's no coincidence here. I was staring at the Win7 taskbar calendar while figuring out how to generate calendars for arbitrary months/years, and how to show the overlap from previous/future months. Add the Bootstrap table and button styles, and you end up with what you see.