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<?php date_default_timezone_set('UTC'); $timestamp = mktime(0,0,0,11,1,2014); var_dump(strtotime('4 thursdays', $timestamp)); var_dump(strtotime('first thursday + 3 weeks', $timestamp)); date_default_timezone_set('America/Chicago'); $timestamp = mktime(0,0,0,11,1,2014); var_dump(strtotime('4 thursdays', $timestamp)); var_dump(strtotime('first thursday + 3 weeks', $timestamp));

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