Wellington時間からSevan時間への変換
19:52:19
+2
21:52:19
+7
+7
+7
+7
+7
+6
+6
+6
+6
+6
+6
+6
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+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3
+3
+2.5
+2
+1.5
+1
+1
+1
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+0
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-1
-1
-1
-1
-1
-1
-2
-2
-2
-5
-5
-5
-5
-6
-6
-7
-7
-8
-9