How can calendar widget's particular cells be coloured?
                +1 
                A: 
                
                
              
            Hey,
I think you should extend the QCalendar Class and add some behavior !
I've found something here : http://www.qtforum.org/article/21614/paintcell-and-qcalendarwidget.html#post79008
As you can see in the example, you could use something like :
QBrush brush;
brush.setColor( Qt::green );
QTextCharFormat cf = calendarWidget->dateTextFormat( date );
cf.setBackground( brush );
calendarWidget->setDateTextFormat( date, cf );
Hope it helps a bit!
                  Andy M
                   2010-03-18 07:45:32