| Argentina | April/May | | | Buenos Aires Book Fair | Buenos Aires |
| Bolivia | April/May | | Every 2 years | The Baroque Music Festival | Chiquitos |
| Colombia | April/May | | End of April - Start of May | Festival de la Leyenda Vallenata | Valledupar |
| Argentina | May | | Open for 1 month | Arte Buenos Aires - Contemporary Art Fair | Buenos Aires |
| Colombia | May | | | Festival Iberoamericano de Teatro (Theatre Exhibition) and Parade | Bogota, every 2 years |
| Venezuela | May | | | La Cruz de Mayo (May Cross Celebrations) | Caracas/National |
| Chile | May | 1 | | Dia de los Trabajadores (Labor Day) | National |
| Ecuador | May | 1 | | Labor Day | National |
| Peru | May | 1 | | Labor Day | National |
| Peru | May | 1 - 7 | | Ritual Pilgrimage for the Snow Star | Cusco |
| Uruguay | May | 1 | | Dia de los Trabajadores (Labor Day) | National |
| Venezuela | May | 1 | | Dia de los Trabajadores | National |
| Peru | May | 2 - 4 | | Alarcitas Handicrafts Fair Dia de Santa Cruz | Puno |
| Paraguay | May | 15 | | Independencia Patria (Independence Day) | National |
| Chile | May | 21 | | Dia de las Glorias Navales (Navy Day) | National |
| Ecuador | May | 24 | | Battle of Pichincha Parades | National |
| Bolivia | May/June | | Late May or early June | Senor del Gran Poder (Feast Day of the Almighty Lord) | La Paz |