| date | entity | event | name |
|---|---|---|---|
| 15/12/1978 | newspaper | date founded | Nguoi Viet Daily News |
| 15/12/1987 | observatory | date founded | Oregon Star Party |
| 15/12/1997 | operating system | date released | SkyOS |
| 15/12/1957 | organization | date founded | Gesellschaft Schweiz-Israel |
| 15/12/1950 | organization | date founded | Comitato termotecnico italiano energia e ambiente |
| 15/12/1980 | organization | date founded | Academy of the Asturian Language |
| 15/12/1983 | organization | date founded | National Commission on the Disappearance of Persons |
| 15/12/1944 | organization | date founded | National Deaf Children's Society |
| 15/12/1975 | organization | date founded | National Weather Association |
| 15/12/1845 | organization | date founded | Neukirchener Erziehungsverein |