12:00 = 12:00

13:00 = 1:00

14:00 = 2:00

15:00 = 3:00

16:00 = 4:00

17:00 = 5:00

18:00 = 6:00

19:00 = 7:00 

20:00 = 8:00

21:00 = 9:00

22:00 = 10:00

23:00 = 11:00