Chuyển đổi thời gian từ West Island sang giờ Sydney
20:17:48
+3.5
23:47:48
+3.5
+3.5
+2.5
+2.5
+2.5
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+1.5
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+0.5
+0.5
+0.5
+0
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-2
-3