Irawansyah, HadiGamalBustami2016-02-042016-02-042016-02-04wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/7903This article discusses the Holt-Winters forecasting method that takes into account the effect of Eid. This method is used to predict total domestic passenggers departing in 5 major ports in Indonesia. Then a comparison is carried out between the method of Holt-Winters and Holt-Winters methods that take into account the effect of Eid. The comparison is done by comparing the mean square error obtained by both methods of forecasting.enforecastingHolt-Winters methodeffect of Eidmean square errorstudent Paper Post Degree