Richfaces allows to specify a custom JavaScript function via the dayClassFunction attribute to control the CSS classes of days:
http://docs.jboss.org/richfaces/4.3.X/4.3.4.Final/vdldoc/rich/calendar.html
Yet this doesn't work in client mode, only after a full server roundtrip the styling gets updated. By doesn't work I mean the function isn't even being called until a server roundtrip occurs.
How would one enable it in client mode?