| date | entity | event | name |
|---|---|---|---|
| 21/07/2011 | file format | date released | Computable Document Format |
| 17/06/2015 - 21/07/2015 | fire | date | Lake Fire |
| 17/07/2015 - 21/07/2015 | fire | date | North Fire |
| 21/07/1921 | organization | date founded | International Committee of Military Medicine |
| 21/07/1943 | airplane | date First flight | Curtiss XP-62 |