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<?php $date = new Datetime('2012-12-31', new DatetimeZone('America/Chicago')); echoln($date->format('r')); $date->modify('-1 month'); echoln($date->format('r'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function echoln() in /in/Lj1aW:5 Stack trace: #0 {main} thrown in /in/Lj1aW on line 5
Process exited with code 255.

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