/// <summary>
/// Returns the previous working day (Mon-Fri, not public holiday)
/// before the specified date (or the same date)
/// </summary>
/// <param name="dt">The date you wish to check</param>
/// <returns>A date that is a working day</returns>
public DateTime PreviousWorkingDay(DateTime dt)
{
return(HolidayCalculator.PreviousWorkingDay(this, dt));
}