Previous and next calendar visible

[unode]

Would it be possible to have an option to display the next and previous month?

I mean something like:

Clicking any of the existing buttons would also update the months.
They should always represent +1 and -1 month from the middle one (current month/day)

[w-jablonski]

Similarly, I would just want the next month, or better next two months in addition to the current one.
It helps greatly when planning events which span 2 months.

I'll allow myself to paste a sample app (Calendula) with a similar view -- see below. Notably, days' names are only presented once. Thanks!