January 1st (new year), January 6 (three wise men day), January 21 (day of Our Lady of la Altagracia), January 26 (Juan Pablo Duarte’s birth day), February 27 (Independence day), April 6 (Holy Friday), May 1st (Labour day), June 7 (Corpus Cristi), August 16 (Restoration day), September 24 (day of Our Lady of las Mercedes), November 6 (Constitution day), December 25 (Christmas).
Some of these dates can be changed from year to year (i.e. if a holiday lands on a Wednesday the government might move it to Monday to make it a long weekend).