| date | entity | event | name |
|---|---|---|---|
| 20/07/2001 | file format | date released | FLAC |
| 20/07/2011 | operating system | date released | Mac OS X Lion |
| 20/07/2000 | organization | date founded | Fundación Internacional María Luisa de Moreno |
| 20/07/2007 | organization | date founded | Urbano S.E. |
| 20/07/1975 | organization | date founded | Bund für Umwelt und Naturschutz Deutschland |