Guanacaste Day is observed in Costa Rica every year on July 25. This holiday commemorates the annexation of the province of Guanacaste from Nicaragua in 1824. Historically, Guanacaste was part of Nicaragua until its administration requested to be annexed by Costa Rica, a move that was approved by the Central American Federation. The day is celebrated under the motto “De la Patria por Nuestro Voluntad,” which translates to “Part of the country by our own choice,” reflecting the pride Guanacastans feel in their decision to join Costa Rica. The holiday highlights the region's cultural identity and history, marking a significant moment in Costa Rican history.