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From: Matt Lundin <mdl@imapmail.org>
To: Joost Kremers <joostkremers@fastmail.fm>
Cc: emacs-orgmode@gnu.org
Subject: Re: Timestamp format questions
Date: Mon, 07 Jun 2010 14:40:30 -0400	[thread overview]
Message-ID: <87ljaq8z4x.fsf@fastmail.fm> (raw)
In-Reply-To: <20100607121554.GA500@vpn-2151.gwdg.de> (Joost Kremers's message of "Mon, 7 Jun 2010 14:15:55 +0200")

Hi Joost,

Joost Kremers <joostkremers@fastmail.fm> writes:

> Most pressing: how can I say that a certain event occurs every week on
> a certain day and time, but only for a limited period? E.g., for
> classes I teach I want to be able to say 'this class takes place from
> April 8 through July 8, every Thursday from 12.00 to 14.00. If I
> write:
>
>    <2010-04-08 Thu 12:00-14.00 +1w>
>
> I get the correct time and interval, but of course it doesn't stop at the
> correct date. However, if I write
>
>    <2010-04-08 Thu 12:00-14.00 +1w>--<2010-07-08 Thu>
>
> then it shows up *every day* in the agenda view, not just on Thursdays. (That
> actually looks like a bug to me, but perhaps I'm doing something
> wrong.)

You can use diary sexps to schedule more complex appointments.

,---- (info "(org) Timestamps") 
| DIARY-STYLE SEXP ENTRIES
|      For more complex date specifications, Org mode supports using the
|      special sexp diary entries implemented in the Emacs calendar/diary
|      package.  For example
| 
|           * The nerd meeting on every 2nd Thursday of the month
|             <%%(diary-float t 4 2)>
`----

See also the following FAQ entry:
http://orgmode.org/worg/org-faq.php#diary-sexp-in-org-files

The function org-diary-class nicely covers the scenario above:

--8<---------------cut here---------------start------------->8---
* 12:00-14:00 Weekly class
<%%(org-diary-class 4 8 2010 7 8 2010 4)>
--8<---------------cut here---------------end--------------->8---

http://orgmode.org/worg/org-faq.php#org-diary-class

> Also, is there a way to say that a certain event that occurs every
> week does not occur on one specific date? For example, I teach a class
> every Thursday, but the Thu. 13th of May was Ascension Day, so the
> class was cancelled. I would like the event to not show up on such
> days.

--8<---------------cut here---------------start------------->8---
* 12:00-14:00 Weekly class
<%%(org-diary-class 4 8 2010 7 8 2010 4 19)>
                                        ;; iso number of the week to skip
--8<---------------cut here---------------end--------------->8---

Best,
Matt

  reply	other threads:[~2010-06-07 18:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-07 12:15 Timestamp format questions Joost Kremers
2010-06-07 18:40 ` Matt Lundin [this message]
2010-06-08  9:13   ` Joost Kremers
2010-06-08 16:32     ` Carsten Dominik
2010-06-08 19:17       ` Joost Kremers

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