hi K.R.Neelima, this code may help u, private void Calendar1_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e) { if(e.Day.Date.Day<=29 && e.Day.Date.Month==01) { e.Cell.Enabled=false; } if(e.Day.Date.Day==29 && e.Day.Date.Month==01) { e.Cell.ForeColor=Color.SkyBlue; } }