[solved] Calendaring customization [highlighting the current month]

I made a method that writes a view with a calendar table which shows all months of a year using the calendaring class. It works as well, and returns this:


But I didn't found a way to highlight only the current month using a template in the calendaring class. I tried to modify the default template but it doesn't work because when I change the class of '{heading_title_cell}<th colspan="{colspan}">{heading}</th>{/heading_title_cell}', it modifies all the month's labels like this:


I'm using the default methods from the basic class tutorial. Any suggestion?