Phuthaditjhaba時間からJeju City時間への変換
11:19:19
+7
18:19:19
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+4.5
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+3.5
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+3.5
+3.5
+3.5
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+3.5
+3
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+2.5
+2
+1.5
+1
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+0
+0
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-1
-1
-1
-1
-1
-1
-2
-5
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-9