All three Skyrim: DLC have been dated for a PlayStation 3 release.
Bethesda’s announced that Dragonborn will be releasing on Feb 12, while Heartfire releases on Feb 19, and Dawnguard will release on Feb 26.
All the three DLC content packs will be sold at half their original price during the first week of release. These dates are for North America only. European dates are to be announced soon.