| date | entity | event | name |
|---|---|---|---|
| 19/05/2010 | file format | date released | WebM |
| 19/05/1953 | nuclear weapons test | date begin | Upshot-Knothole Harry |
| 19/05/1907 | organization | date founded | Japan Society (Manhattan) |
| 19/05/1919 | organization | date founded | National Parks Conservation Association |
| 19/05/1989 | organization | date founded | Estonian Physical Society |