National Day of Costa Rica The National Day of Costa Rica is on the 15 September (Independence from Spain 1821) VN:F [1.9.22_1171]please wait...Rating: 0.0/10 (0 votes cast)VN:F [1.9.22_1171]Rating: 0 (from 0 votes) Related Posts Northern Territory Public Holidays ( )NSW Public Holidays ( )Western Australia Public Holidays ( )Afganistan National Day ( )Albania National Day ( )Algeria National Day ( )Andorra National Day ( ) Related posts: National Day of Anguilla National Day of Bahrain National Day of Bolivia National Day of Cameroon September 1, 2011 admin National Day Comments Off on National Day of Costa Rica