The earliest date supported by the System.Globalization.JapaneseCalendar class is September 8, 1868 C.E., in the first year of the Meiji era. Ordinarily, date and time operations that use the System.Globalization.JapaneseCalendar class throw an ArgumentOutOfRangeException exception for dates before this date. However, some members, such as the JapaneseCalendar.GetEra(DateTime) method, support dates from January 1, 1868 through September 7 in the year Meiji 1.