Better Distinguish Month in Calendar


I am using Vaadin Calendar. It is a great UI component.

Is there a way I can make it better distinguish months on the calendar? For example, making different months with different background colors, or making the dates contains months and year as well. For example, for a monthly view of January (like attached screenshot), only January 1st says 1 Jan, while other days only have the date number, which makes it difficult to tell which month it is currently showing.

Anyone might have some idea on this?