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<?php $start = new DateTimeImmutable('2012-01-01'); $end = new DateTimeImmutable('2014-12-31'); while($start <= $end) { $nextdate = ($start->modify('+1 month'))->format('Y-m-d'); $prevdate = ($start->modify('-1 month'))->format('Y-m-d'); echo $prevdate.'<br>'; echo $nextdate.'<br>'; $start = $start->modify('+1 month'); }
Output for git.master, git.master_jit, rfc.property-hooks
2011-12-01<br>2012-02-01<br>2012-01-01<br>2012-03-01<br>2012-02-01<br>2012-04-01<br>2012-03-01<br>2012-05-01<br>2012-04-01<br>2012-06-01<br>2012-05-01<br>2012-07-01<br>2012-06-01<br>2012-08-01<br>2012-07-01<br>2012-09-01<br>2012-08-01<br>2012-10-01<br>2012-09-01<br>2012-11-01<br>2012-10-01<br>2012-12-01<br>2012-11-01<br>2013-01-01<br>2012-12-01<br>2013-02-01<br>2013-01-01<br>2013-03-01<br>2013-02-01<br>2013-04-01<br>2013-03-01<br>2013-05-01<br>2013-04-01<br>2013-06-01<br>2013-05-01<br>2013-07-01<br>2013-06-01<br>2013-08-01<br>2013-07-01<br>2013-09-01<br>2013-08-01<br>2013-10-01<br>2013-09-01<br>2013-11-01<br>2013-10-01<br>2013-12-01<br>2013-11-01<br>2014-01-01<br>2013-12-01<br>2014-02-01<br>2014-01-01<br>2014-03-01<br>2014-02-01<br>2014-04-01<br>2014-03-01<br>2014-05-01<br>2014-04-01<br>2014-06-01<br>2014-05-01<br>2014-07-01<br>2014-06-01<br>2014-08-01<br>2014-07-01<br>2014-09-01<br>2014-08-01<br>2014-10-01<br>2014-09-01<br>2014-11-01<br>2014-10-01<br>2014-12-01<br>2014-11-01<br>2015-01-01<br>

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