protected void FormatSpecialDay(object sender, EventArgs e) { RadCalendar1.SelectedDate = DateTime.Now; RadCalendar1.SpecialDays.Clear(); DateTime startDate = ((MonthView)RadCalendar1.CalendarView).MonthStartDate; DateTime endDate = ((MonthView)RadCalendar1.CalendarView).MonthEndDate; IList <Holiday> holEnts = Holiday.FindAllByProperty("Date", Holiday.Prop_Year, DateTime.Now.Year.ToString()); foreach (Holiday holEnt in holEnts) { if (holEnt.Date.HasValue) { Telerik.Web.UI.RadCalendarDay rcd = new Telerik.Web.UI.RadCalendarDay(); rcd.Date = holEnt.Date.Value; rcd.ItemStyle.CssClass = "myclass"; RadCalendar1.SpecialDays.Add(rcd); } } }