Dumai時間
18:00:10
日出: 05:56:03 
日落: 17:59:3019:00:10
14:00:10
08:00:10
16:30:10
05:00:10
19:00:10
16:00:10
19:00:10
19:00:10
16:30:10
14:00:10
19:00:10
17:00:10
20:00:10
08:00:10
Dumai與主要城市的時差
+4
+4
+2
+2
+2
+2
+2
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+0
+0
+0
-1
-1
-1
-1
-2
-2
-3
-4
-4
-4
-4
-4
-4
-4
-5
-5
-5
-5
-6
-6
-6
-6
-6
-6
-6
-7
-7
-10
-10
-10
-10
-11
-12
-12
-12