Running for the firts time, the calendar displays correctly the things i want to; but if I navigate to another monts in the calendar, the event is is not fired, so the render of the things I want seems not to work. This si the code: Protected Sub RadCalendar1_DayRender(ByVal sender As Object, _ ByVal e As Telerik.Web.UI.Calendar.DayRenderEventArgs) _ Handles RadCalendar1.DayRender Dim CurrentDate As DateTime = e.Day.[Date] If CurrentDate.Month <> RadCalendar1.FocusedDate.Month Then e.Cell.Text = "(" + CurrentDate.Day + ")" ElseIf e.Day.IsToday Then e.Cell.Style("background-color") = "Red" End If End Sub Thanks