> The 'cal' function:
>
> # cal
> (null) 1996
>
> 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
I think it's a libc issue. I don't know why this happens, but I found that
simply recompiling "cal" fixed the problem for me.