Two-letter code that determines the dates on which daylight savings time begins and ends (you can view the rules by pressing the "Explain DST Rules" button in the Geographic Location window).
O código de dúas letras que determina as datas nas que comeza e remata a mudanza de hora (pode ver as regras premendo o botón "Explicar as regras DST" na xanela de lugar xeográfico).