Riyadh時間からIgbor時間への変換
15:05:03
-2
13:05:03
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+2
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+1
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-3
-3
-6
-6
-6
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-7
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-8
-9
-11