System.Globalization.GregorianCalendar
namespace System.Globalization
{
public class GregorianCalendar : Calendar
{
public const int ADEra = 1;
public virtual GregorianCalendarTypes CalendarType { get; set; }
public GregorianCalendar();
public GregorianCalendar(GregorianCalendarTypes type);
}
}