| date | entity | event | name |
|---|---|---|---|
| 20/06/2005 | flag | date Adopted | Flag of Fuentesoto |
| 20/06/1977 | oil field | date Start of production | Prudhoe Bay Oil Field |
| 20/06/1750 | mountain | date First Ascent | Hekla |
| 20/06/2011 | operating system | date released | Porteus (operating system) |
| 20/06/1988 | organization | date founded | Assembly of European Wine-producing Regions |