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<?php $refDate = new DateTime('2013-09-11'); $previousMonthClose = new DateTime( date( 'Y-m-d', strtotime('1/1 this year -1 day', $refDate->getTimestamp()) ) ); echo $previousMonthClose->format('Y-m-d');
Output for git.master, git.master_jit, rfc.property-hooks
2012-12-31

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