Riyadh時間からEl Obeid時間への変換
16:00:23
-1
15:00:23
+7
+7
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+2
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+1
+0.5
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-6
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-10