| date | entity | event | name |
|---|---|---|---|
| 30/12/1976 | city | date founded | Sainte-Anne-du-Lac |
| 30/12/1952 | airplane | date First flight | Toyo T-T.10 |
| 30/12/1797 | encyclical | date | Christi Ecclesiae |
| 30/12/1905 | flag | date Adopted | Royal Standard of Norway |
| 30/12/1998 | organization | date founded | Gestor de Infraestructuras Ferroviarias |
| 30/12/1985 | organization | date founded | Defensoria Pública do Estado da Bahia |
| 30/12/1924 | organization | date founded | Departamento de Ordem Política e Social |
| 30/12/1917 | organization | date founded | Academia Piauiense de Letras |
| 30/12/1941 | organization | date founded | American Society of Criminology |
| 30/12/1932 | organization | date founded | All India Institute of Hygiene and Public Health |