Conversion de l'heure de Lancy à l'heure de Buenos Aires
15:21:10
-5
10:21:10
+7
+7
+7
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+2
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+1
+1
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
-6
-6
-6
-7
-7
-8
-9