@Nick That works! Thank you!

I used the below instead (learned that I needed to escape that comma).

#+DATE: {{{time(%b %d %Y\, %a)}}}

I had read about {{{date}}} but assumed that {{{time}}} does the same thing
as {{{date}}} because they are put together with the same description. The
documentation actually doesn't tell what {{{time}}} does:
http://orgmode.org/manual/Macro-replacement.html


@John: Looks like I will not need any elisp hacks :)



--
Kaushal Modi

On Thu, Aug 6, 2015 at 2:18 PM, John Kitchin <jkitchin@andrew.cmu.edu>
wrote:

> I use a function like that here:
> https://github.com/jkitchin/jmax/blob/master/techela/techela-grade.el#L182
>
> and to set the filetag as you suggest you would call it like this:
>
> #+BEGIN_SRC emacs-lisp
> (gb-set-filetag "DATE" (format-time-string "%b %d %Y, %a" (current-time)))
> #+END_SRC
>
> You could put that in some hook function if you like.
>
> Kaushal writes:
>
> >> Why don't you just use a timestamp?
> >
> > But that would need me to insert the timestamp manually each time before
> > exports
> >
> >> You can update whenever you want or using
> >>    (org-insert-time-stamp (current-time))
> >> at the right spot.
> >
> > Wouldn't that too need manual navigation to #+date: and then eval that
> > elisp form?
>
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu
>