| date | entity | event | name |
|---|---|---|---|
| 18/05/1980 | eruption | date | 1980 eruption of Mount St. Helens |
| 05/05/2009 - 18/05/2009 | fire | date | Jesusita Fire |
| 18/05/2001 | roller coaster | date Opened | Cornball Express |
| 18/05/1977 | protected area | date founded | Bua hed |
| 18/05/2005 | protected area | date founded | Cotahuasi Subbasin Landscape Reserve |