| date | entity | event | name |
|---|---|---|---|
| 17/07/1944 | eruption | date | Port Chicago disaster |
| 17/07/2010 | observatory | date founded | Killarney Provincial Park Observatory |
| 17/07/1984 | protected area | date founded | Parco regionale Marturanum |
| 17/07/1951 | organization | date founded | Delaware River Port Authority |
| 17/07/2003 | organization | date founded | Haut Conseil du commissariat aux comptes |