On Wed, 20 Oct 2010 00:16:51 +0200, Rainer Thiel <r.thiel@uni-jena.de> wrote:
> 
> 2010/10/19 Eric S Fraga <ucecesf@ucl.ac.uk>:
> > On Mon, 18 Oct 2010 22:53:45 +0200, Rainer Thiel <r.thiel@uni-jena.de> wrote:
> > Emacs -> Calendar/Diary -> Advanced Calendar/Diary usage -> Sexp Diary Entries
> 
> Thanks for trying to help out.  I cannot discover any hint to how to
> define an end date for repeater intervals there, though.  It is
> probably obvious to professional lisp programmers.  But while I have
> done some lisp programming, this is not really my field.

Rainer,

Matt Lundin has just posted a respond (in another thread) which answers your question:

On Wed, 20 Oct 2010 21:31:04 -0400, Matt Lundin <mdl@imapmail.org> wrote:
> 
> Christopher Witte <chris@witte.net.au> writes:
> 
> > Is there a way to get timestamps that repeat (say weekly) up to a
> > certain date when it stops repeating?  I have a weekly appointment that
> > will only go for the next 8 weeks and I don't want to have to input
> > each appointment separately and I don't want it cluttering up my diary
> > beyond it's end date.
> 
> Though you can't yet do this with org-mode timestamps, you can use a
> diary sexp. Does the following FAQ help?
> 
> http://orgmode.org/worg/org-faq.php#org-diary-class
> 
> Best,
> Matt
> 
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