Hi Paul,
Thank you for your interest in RadCalendar. You can style the selected days any way you want including changing the color and adding an icon by creating an SpecialTemplate. An example and more information about the SpecialTemplate is available
here. To add the SpecialTemplate on the selected days you just need to use a SelectTemplate like this:
I hope this helps. Let me know if I can assist you further.
Regards,
Todor
the Telerik team
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