Heure à Guyancourt
08:26:57
Lever du soleil: 08:43:39 
Coucher de soleil: 17:00:0515:26:57
10:26:57
04:26:57
12:56:57
01:26:57
15:26:57
12:26:57
15:26:57
15:26:57
12:56:57
10:26:57
15:26:57
13:26:57
16:26:57
04:26:57
Décalage horaire entre Guyancourt et les grandes villes
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+7
+6
+6
+6
+5.5
+5
+5
+5
+5
+4.5
+4.5
+4.5
+4.5
+4.5
+4.5
+4.5
+4.5
+4.5
+4.5
+4
+4
+3.5
+3
+2.5
+2
+2
+2
+2
+2
+2
+2
+1
+1
+1
+1
+0
+0
+0
+0
+0
+0
+0
-1
-1
-4
-4
-4
-4
-5
-6
-6
-6
-7
-9