Conversão da hora de West Island para a hora de Shiyan
07:11:09
+1.5
08:41:09
+3.5
+3.5
+2.5
+2.5
+2.5
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+0.5
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+0
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-2
-3