Ans time to Supaul time conversion
20:23:37
+3.5
23:53:37
+7
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+4.5
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+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3.5
+3
+3
+2.5
+2
+1.5
+1
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+1
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
-5
-6
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-9