1978-12-06: Centenary of the Cathedral of San Jose

1978-11-20: 500th birth anniv. of Gonzalo Fernandez de Oviedo

1978-11-20: For the City of Children (1978)

1978-11-13: Christmas 1978

1978-11-13: Orchids: surcharged

1978-11-08: Centenary asylum Carlos Maria Ulloa

1978-11-01: 50th Anniv. of Lindbergh's visit to Costa Rica

1978-11-01: PAN AM´s First Flight to Costa Rica, 50th Anniv.

1978-10-24: 1961 Stamp Exhibition

1978-09-18: Central American University Federation, 30th anniversary

1978-08-28: Pan-American Geography and History Institute, 50th anniv.

1978-08-07: Bicentenary of the Liberator, General José de San Martín

1978-07-17: National five-year literacy plan.

1978-03-21: Conf.of Latin American Tourist Organizations