| date | entity | event | name |
|---|---|---|---|
| 04/12/1987 | observatory | date founded | Paranal Observatory |
| 04/12/1987 | observatory | date founded | Yebes Observatory |
| 04/12/1998 | operating system | date released | Windows Embedded Automotive |
| 04/12/1992 | organization | date founded | Invoice Inc. |
| 04/12/1954 | organization | date founded | Federação Mineira de Futsal |