Thanks for the response Scott.
I know that Datepicker doesn't use the button widget for next/prev buttons.
My first thought when implementing this was use the datepicker styles.
But I could not do that because the styles are scoped to .ui-datepicker.
If I wrap my month picker markup with a ui-datepicker class it messes up my layout.
Seeing that you also think that datepicker should use the button widget for next/prev buttons are you willing to discuss building support for this into the button widget?
If I have some kind of spec I can implement it and open a PR on GitHub.