| date | entity | event | name |
|---|---|---|---|
| 17/04/1991 | city | date founded | Saint-Ours, Quebec |
| 17/04/1998 | attraction | date Opened | Dalton Terror |
| 17/04/1934 | airplane | date First flight | De Havilland Dragon Rapide |
| 17/04/1921 | airplane | date First flight | Friesley Falcon |
| 17/04/1943 | airplane | date First flight | IMPA Tu-Sa |