| date | entity | event | name |
|---|---|---|---|
| 18/04/1980 | former country | data end | Southern Rhodesia |
| 18/04/1981 | file format | date released | Device independent file format |
| 18/04/1951 | organization | date founded | European and Mediterranean Plant Protection Organization |
| 18/04/1951 | organization | date founded | European Coal and Steel Community |
| 18/04/1952 | organization | date founded | Federação Gaúcha de Basketball |
| 18/04/1833 | organization | date founded | Sociedad Mexicana de Geografía y Estadística |
| 18/04/2009 | organization | date founded | Telecomix |
| 18/04/1963 | organization | date founded | Unión de Rugby del Noreste |
| 18/04/1997 | organization | date founded | American Registry for Internet Numbers |
| 18/04/1996 | airline | date Commenced operations | Air Jamaica Express |