I have tried these methods and it still does not change for me.
Here is my situation:
I have created a custom skin, inherited from the Office2007 skin. I have changed nothing other than the names of the CSS files and the names of the styles inside of the CSS files. I have gotten other skins to respond to the changes, but so far, not the DatePicker.
I have the following delcaration in my skin file. The DateInput-Font-Size works, the Calendar-Font-Size does not:
|<telerik:RadDatePicker runat="server" Font-Size="8" Calendar-Font-Size="8" DateInput-Font-Size="8" />
I have also tried putting the Font-Size directly on the control and it does not respond either. I also tried setting the font size at PreInit on my page events and that too had no affect.
Any help is appreciated.