The Carnation Revolution, called in Portuguese Revolução dos Cravos, also known as the 25 April (Portuguese: 25 de Abril), was a military coup by left-leaning military officers that overthrew the authoritarian Estado Novo government on April 25, 1974 in Lisbon. It marked the beginning of a democratic life in Portugal and at the same time did put an end to the Portuguese colonial war.

To commemorate the 50th anniversary of this important day, Portugal, associated to Angola and Cape Verde, released a joint issue on March 28, 2024, representing the symbol of this peaceful revolution, a carnation flower, and obviously entitled “25 ABRIL”. Each country issued two identical stamps. The Portuguese postal administration offers also a folder containing the 6 joint stamps, mint, a dedicated Portuguese miniature sheet with 6 different stamps, the two Portuguese stamps and the souvenir sheet, mint, issued at the occasion of the 40th anniversary in 2014 (price € 15.00).