Question: When did the last season of jersey shore air?

context: On January 25, 2011, it was confirmed that the show had been renewed for a fourth season, to be filmed in Italy during the first half of 2011. The fourth season premiered August 4, 2011. MTV confirmed in June 2011 that the fifth season would return to Seaside Heights.
question: When did season 4 of jersey shore first air?
short_answers: August 4, 2011
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question: When did season 4 of jersey shore last air?
short_answers: October 20, 2011
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question: When did season 5 of jersey shore first air?
short_answers: January 5, 2012
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question: When did season 5 of jersey shore last air?
short_answers: March 15, 2012
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question: When did season 6 of jersey shore first air?
short_answers: October 4, 2012
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question: When did season 6 of jersey shore last air?
short_answers: December 20, 2012

Answer: Jersey Shore is an American reality television series that ran on MTV from December 3, 2009, to December 20, 2012, in the United States. Season 4 premiered August 4, 2011 and ended on October 20, 2011. Season 5 started on January 5, 2012 and ended on March 15, 2012. Season 6 started on October 4, 2012 and ended on December 20, 2012.