| date | entity | event | name |
|---|---|---|---|
| 11/05/1996 | roller coaster | date Opened | Colorado Adventure |
| 11/05/2001 | file format | date released | YAML |
| 11/05/1998 | nuclear weapons test | date begin | Pokhran-II |
| 11/05/1949 | team | date Foundation | Atlético Bucaramanga |
| 11/05/2018 | operating system | date released | RIOT (operating system) |