Currently, there is no public API to customize the visible month window. The built-in header buttons move the months window by a two-month span.

Provide a way in the MultiViewCalendar to programmatically shift the displayed months by one month backward or forward. For example:

1. Calendar currently shows June and July
2. User clicks a Previous button - calendar should show May and June
3. Or, user clicks a Next button - calendar should show July and August