Question: Recess is the debut studio album by American music producer Skrillex, released on which date, he's an American electronic dance music producer, DJ, singer, songwriter and multi-instrumentalist?
Sentence (from "Bangarang (EP)"): It was announced via Skrillex's Twitter page on December 12, 2011 that the EP was completed, while the release date was also announced on December 21.
Relevant evidence: No