This object is provided to the DayRenderEventHandler. It identifies the CalendarDay that is about to be added and the TableCell that contains the date by means of the Day and Cell properties. The Calendar.DayRender event is fired for every currently displayed day. This includes days from the preceding and following month, which are used to fill out the first and last week on the calendar.

public sealed class DayRenderEventArgs {
// Public Constructors
   public DayRenderEventArgs(TableCell cell, CalendarDay day);
// Public Instance Properties
   public TableCell Cell{get; }
   public CalendarDay Day{get; }
}

Passed To

DayRenderEventHandler.{BeginInvoke( ), Invoke( )}