Busia時間からMexico City時間への変換
21:18:55
-9
12:18:55
+7
+7
+6
+6
+6
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+6
+5
+5
+5
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+2
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+1
+0.5
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-7
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-7
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-9
-10