Gravesendの時間
22:29:21
日の出: 05:30:08 
日没: 20:15:4510:29:21
05:29:21
23:29:21
07:59:21
20:29:21
10:29:21
07:29:21
10:29:21
10:29:21
07:59:21
05:29:21
10:29:21
08:29:21
11:29:21
23:29:21
Gravesendと主要都市の時差
+7
+7
+7
+7
+7
+7
+7
+7
+7
+6
+6
+6
+6
+5
+5
+5
+5
+5
+5
+4
+1
+1
+1
+0
+0
+0
-1
-1
-2
-3