Whilst working with the monthly outlook, the little calendar on the bottom left corner is still visible. If this seems unnecessary to a person, they should be able to minimize the calendar to just see one monthly view.
Steps to reproduce:
1. Choose the monthly overview on the main calendar
You have to monthly views next to each other.
Changing the widget would allow the user easy navigation through the months in a year - so instead of showing the days in a months, the months in a year are shown and the purpose of the little calendar (overview, navigation) is best fulfilled.