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<?php function calculate_birth_year($age, $day_month_string) { $now = new DateTime("now", new DateTimeZone('America/New_York')); if (preg_match('#^([0-9]+) ([a-z]+)$#', $day_month_string)) { $dt = new DateTime($day_month_string, new DateTimeZone('America/New_York')); if ($dt > $now) { ++$age; } return $dt->modify("$age years ago")->format('Y'); } else return false; } echo calculate_birth_year('34', '7 dec');
Output for git.master, git.master_jit, rfc.property-hooks
1982

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