JDN
| Acronym | Definition |
|---|---|
| JDN | Julian Day Number (astronomical calendar) |
| JDN | Joint Data Network |
| JDN | Juvenile Defense Network (Roxbury, MA) |
| JDN | Jewish Disabilities Network (Jewish Family Service) |
| JDN | Jackson Daily News (Jackson, MS) |
| JDN | Jewelry Dealers Network (Lodi, CA) |