ok here i found this thing
http://wwp.greenwichmeantime.com/gmt-converter.htmheres the time
+1 14:00 (2:00 P.M.), same day
+2 15:00 (3:00 P.M.), same day
+3 16:00 (4:00 P.M.), same day
+4 17:00 (5:00 P.M.), same day
+5 18:00 (6:00 P.M.), same day
+5.5 18:30 (6:30 P.M.), same day
+6 19:00 (7:00 P.M.), same day
+7 20:00 (8:00 P.M.), same day
+8 21:00 (9:00 P.M.), same day
+9 22:00 (10:00 P.M.), same day
+10 23:00 (11:00 P.M.), same day
+11 00:00 (Midnight), next day
+12 01:00 (1:00 A.M.), next day
+13 02:00 (2:00 A.M.), next day
+14 03:00 (3:00 A.M.), next day
-1 12:00 (Noon), same day
-2 11:00 (11:00 A.M.), same day
-3 10:00 (10:00 A.M.), same day
-4 09:00 (9:00 A.M.), same day
-5 08:00 (8:00 A.M.), same day
-6 07:00 (7:00 A.M.), same day
-7 06:00 (6:00 A.M.), same day
-8 05:00 (5:00 A.M.), same day
-9 04:00 (4:00 A.M.), same day
-10 03:00 (3:00 A.M.), same day
-11 02:00 (2:00 A.M.), same day
-12 01:00 (1:00 A.M.), same day