| date | entity | event | name |
|---|---|---|---|
| 12/06/2018 | file format | date released | SWF |
| 12/06/2007 | file system | date released | Btrfs |
| 12/06/1961 | fire | data end | Night of Fire |
| 12/06/2002 | newspaper | date Ceased publication | El Metropolitano |
| 12/06/1921 | team | date Foundation | C.S. Herediano |