Viljandi時間からNew York City時間への変換
21:19:01
-7
14:19:01
+7
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+6
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+5
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+3
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+2.5
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+2.5
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+2
+2
+1.5
+1
+0.5
+0
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+0
+0
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-1
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-1
-2
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-6
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