Heure à Guyancourt
03:59:22
Lever du soleil: 06:05:20 
Coucher de soleil: 21:50:1109:59:22
04:59:22
22:59:22
07:29:22
19:59:22
09:59:22
06:59:22
09:59:22
09:59:22
07:29:22
04:59:22
09:59:22
07:59:22
10:59:22
22:59:22
Décalage horaire entre Guyancourt et les grandes villes
03:59:22
-6
21:59:22
+7
+7
+7
+7
+7
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+6
+5
+5
+5
+4.5
+4
+4
+4
+4
+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
+1
+1
+1
+1
+1
+1
+1
+1
+0
+0
+0
+0
-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
-6
-6
-6
-7
-7
-8
-9