Bprint didn't seem to like %u, giving the following output:
[egates-vm 9base 686]$ cal/cal
   June %
% S  M Tu  W Th  F  S
    1  2  3  4  5  6
 7  8  9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30
Changing to %d fixes this:
[egates-vm 9base 692]$ cal/cal
   June 2015
 S  M Tu  W Th  F  S
    1  2  3  4  5  6
 7  8  9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30
Patch attached.
-emg
Received on Thu Jun 18 2015 - 20:01:37 CEST