Saint Petersburg時間からDatteln時間への変換
21:23:18
-1
20:23:18
+7
+7
+6
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+5
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+2.5
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+2.5
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+2
+2
+1.5
+1
+0.5
+0
+0
+0
+0
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+0
-1
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-1
-1
-2
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-6
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