Czas Dumai
08:57:19
Wschód słońca: 06:26:33 
Zachód słońca: 18:29:5509:57:19
04:57:19
22:57:19
07:27:19
19:57:19
09:57:19
06:57:19
09:57:19
09:57:19
07:27:19
04:57:19
09:57:19
07:57:19
10:57:19
22:57:19
Różnica czasu między Dumai a większymi miastami
+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