Great Falls時間
12:29:41
日出: 07:49:12 
日落: 19:22:0302:29:41
21:29:41
15:29:41
23:59:41
12:29:41
02:29:41
23:29:41
02:29:41
02:29:41
23:59:41
21:29:41
02:29:41
00:29:41
03:29:41
15:29:41
Great Falls與主要城市的時差
+7
+7
+7
+7
+7
+7
+6
+6
+6
+3
+3
+3
+3
+2
+2
+1
+1
+0
-1