Grand Rapids時間
02:31:45
日出: 07:57:57 
日落: 18:58:1714:31:45
09:31:45
03:31:45
12:01:45
00:31:45
14:31:45
11:31:45
14:31:45
14:31:45
12:01:45
09:31:45
14:31:45
12:31:45
15:31:45
03:31:45
Grand Rapids與主要城市的時差
+7
+7
+7
+7
+7
+7
+7
+7
+7
+6
+6
+6
+6
+5
+5
+5
+5
+5
+5
+4
+1
+1
+1
+1
+0
+0
-1
-1
-2
-3