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<?php $now = new DateTimeImmutable("2015-03-31"); var_dump($now->format("Y-m-d")); var_dump($now->modify("-1 month")->format("Y-m-d"));
Output for git.master, git.master_jit, rfc.property-hooks
string(10) "2015-03-31" string(10) "2015-03-03"

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