Rostov時間からNew York City時間への変換
12:30:31
-7
05:30:31
+7
+7
+6
+6
+6
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+6
+5
+5
+5
+5
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+2.5
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+2
+2
+1.5
+1
+0.5
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-10