diff --git a/hwe/sammo/TurnExecutionHelper.php b/hwe/sammo/TurnExecutionHelper.php
index febb71b5..e9c37a89 100644
--- a/hwe/sammo/TurnExecutionHelper.php
+++ b/hwe/sammo/TurnExecutionHelper.php
@@ -312,7 +312,13 @@ WHERE turntime < %s ORDER BY turntime ASC, `no` ASC',
         $nextTurn = addTurn($prevTurn, $gameStor->turnterm);
 
         $maxActionTime = ini_get('max_execution_time');
-        $maxActionTime = max($maxActionTime * 2 / 3, $maxActionTime - 10);
+        if($maxActionTime == 0){
+            $maxActionTime = 60;
+        }
+        else {
+            $maxActionTime = max($maxActionTime * 2 / 3, $maxActionTime - 10);
+        }
+        
         $limitActionTime = (new \DateTimeImmutable())->add(TimeUtil::secondsToDateInterval($maxActionTime));
 
         // 현재 턴 이전 월턴까지 모두처리.
@@ -326,8 +332,6 @@ WHERE turntime < %s ORDER BY turntime ASC, `no` ASC',
             // 트래픽 업데이트
             updateTraffic();
 
-            /*
-            TODO: executionOver 재설계
             if($executionOver){
                 if($currentTurn !== null){
                     $gameStor->turntime = $currentTurn;
@@ -335,7 +339,6 @@ WHERE turntime < %s ORDER BY turntime ASC, `no` ASC',
                 unlock();
                 return;
             }
-            */
             
 
             // 1달마다 처리하는 것들, 벌점 감소 및 건국,전턴,합병 -1, 군량 소모
diff --git a/src/sammo/TimeUtil.php b/src/sammo/TimeUtil.php
index cc0c00a4..f06ecb6c 100644
--- a/src/sammo/TimeUtil.php
+++ b/src/sammo/TimeUtil.php
@@ -79,13 +79,13 @@ class TimeUtil
     public static function secondsToDateInterval(float $fullSeconds): \DateInterval{
         $d0 = new \DateTime("@0");
 
-        return static::secondsToDateTime($fullSeconds, true)->diff($d0);
+        return $d0->diff(static::secondsToDateTime($fullSeconds, true));
     }
 
     public static function DateTimeToSeconds(\DateTimeInterface $dateTime): float{
         $d0 = new \DateTimeImmutable("@0");
 
-        return static::DateIntervalToSeconds($dateTime->diff($d0));
+        return static::DateIntervalToSeconds($d0->diff($dateTime));
     }
 
     public static function DateIntervalToSeconds(\DateInterval $interval): float{