| date | entity | event | name |
|---|---|---|---|
| 07/04/1949 | former country | data end | Jaipur State |
| 07/04/2006 | file format | date released | SDEP |
| 07/04/1998 | file format | date released | MathML |
| 07/04/1987 | flag | date Adopted | Flag of Vigo |
| 07/04/1964 | team | date Foundation | ASV De Flamingo27s 2764 |