Howick 시간을 Walnut Grove 시간으로 변환
12:17:00
-10
02:17:00
+7
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+4.5
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+3.5
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+3.5
+3
+3
+2.5
+2
+1.5
+1
+1
+1
+1
+1
+1
+1
+0
+0
+0
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-1
-1
-1
-1
-1
-1
-1
-2
-2
-5
-5
-5
-5
-6
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-10