Code

private void calendar_Draw(object sender, MindFusion.Scheduling.WinForms.CustomDrawArgs e)
{
	if (e.Date == new DateTime(2006, 12, 24) ||
		e.Date == new DateTime(2006, 12, 25))
	{
		if (e.Element == CustomDrawElements.DayHeader)
		{
			if (calendar1.Selection.Contains(e.Date))
				e.Graphics.FillRectangle(Brushes.Yellow, e.Bounds);
			else
				e.Graphics.FillRectangle(Brushes.LightSteelBlue, e.Bounds);

			RectangleF bounds = new RectangleF(
				e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);
			Brush brush = new SolidBrush(e.Style.HeaderTextColor);
			Font f = e.Style.HeaderFont;
			if (f == null)
				f = Font;

			StringFormat format = new StringFormat();
			// We should check e.Style.HeaderTextAlignment,
			// but use centered for simplicity
			format.Alignment = StringAlignment.Center;
			format.LineAlignment = StringAlignment.Center;

			e.Graphics.DrawString(e.Date.Day.ToString(),
				f, brush, bounds, format);

			format.Dispose();
			brush.Dispose();
		}
		else if (e.Element == CustomDrawElements.DayContents)
		{
			if (calendar1.Selection.Contains(e.Date))
				e.Graphics.FillRectangle(Brushes.DarkGoldenrod, e.Bounds);
			else
				e.Graphics.FillRectangle(Brushes.SteelBlue, e.Bounds);
		}
	}
}