Thanks Craig for the info
i completed it by pasting this code in page class
protected override void InitializeCulture()
{
CultureInfo culture = new CultureInfo("en-US");
culture.DateTimeFormat.ShortDatePattern = "dd-MMM-yyyy";
culture.DateTimeFormat.DateSeparator = "-";
Thread.CurrentThread.CurrentCulture = culture;
}
trying to implement at application level