Paul Sexton <psexton@xnet.co.nz> writes:

> Yes.
> "Wrong type argument: commandp, list-calendar-holidays"
>
>

I think the following patch will fix the issue for you.

Log
[[[

Make org-agenda-holidays compatible with older versions of emacs.

* lisp/org-agenda.el (org-agenda-holidays): Make this function compatible
  with older versions of emacs.

]]]

Thanks and Regards
Noorul