I assumed you wouldn't be interested in this, so I would need to modify one or two files. I'm only interested in the month view for this feature. Not knowing how complicated this might be, it would be fabulous if you could tackle this project.
We've all grown up with the typical paper calendar that flips over to a new page each month. Each month with a different picture and perhaps different theme. It's nice to 'turn the page' - different month, different season, different colors. Two new features to your wonderful calendar would go a long way to recapture that familiar feel.
Navigation: As I understand it, the date bar arrows move a full year (52 weeks?) or 4 weeks. Rather than +- 4 weeks, I would like an option for the 4 week arrows to move from month to month, like flipping a calendar. Of course the last few days of the preceding month would appear in the top week as would days of the next month in the bottom week(s) - still maintaining 6 weeks in each view. In this manner, the pages in the monthly view calendar would 'flip over' more like a traditional paper calendar.
Colors: Yes, a 12 x 2 table of colors (e.g. #D7FFD7) is needed. The bar color would be associated with the only full month shown on the page. The background color would of course vary with the month of the actual day.
Perhaps a "fixed month" view would only allow for 6 weeks visible at one time. But that's not necessary. The bar colors could just apply to the first complete month shown.