Calendar date picker Date Format change

void Application_BeginRequest(Object sender, EventArgs e)
{
System.Globalization.CultureInfo newCulture = (System.Globalization.CultureInfo)System.Threading.Thread.CurrentThread.CurrentCulture.Clone();

newCulture.DateTimeFormat.ShortDatePattern = "MM/dd/yyyy";
newCulture.DateTimeFormat.DateSeparator = "/";

System.Threading.Thread.CurrentThread.CurrentCulture = newCulture;
}

Try this Global.asax page and

web.config page.

<system.web>
<globalization culture="en-US" uiculture="en-US">