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Re: [Emacs-orgmode] Midnight and noon in agendas

From: Carsten Dominik
Subject: Re: [Emacs-orgmode] Midnight and noon in agendas
Date: Fri, 2 Jun 2006 07:15:15 +0200

Well, if this is the way things are normally interpreted,
then this is clearly a bug.  Thanks for explaining this to me.
Strange system. Switching am to pm always makes the event happen later, except when the hour is 12.

However, I will not make items jump days because of a time specification. This has first of all technical reasons: Agenda entries are collected based on the date only. The time-of-day specification is only used later in the process to sort the entries on the day. So given this restriction, what would you or other people here want:

Should 12am be listed as 0:00 or as 24:00?
Should 12:21am be listed as 0:21 or as 24:21?

It seems to me that the logic would be a bit better to schedule these show uo as 0:00 and 0:21. If you wanted to put something at midnight at the end of the day you would then have to use 24:00 and 24:21.


- Carsten

On Jun 2, 2006, at 1:36, Daniel J. Sinder wrote:

I've noticed that '12pm' when used as a time-of-day specification
puts an entry at 24:00 in the agenda.  '12am' places the item at
noon in the agenda.

It is arguable whether 00:00 should be used instead of 24:00.
Personally, I prefer it the way it is, where midnight events are
placed at 24:00 because if I have something scheduled/due at
midnight, I'd like to see it on the agenda for the day *preceding*
the event/item.

However, the issue I differ on is the interpretation of 12am as noon
and 12pm as midnight.  Although they are both ambiguous, it seems
that 12am is more typically associated with midnight, while 12pm is
associated with noon.  One explanation goes like this:  Since the
24-hour clock runs from 00:00:00--23:59:59, then 00:00:00-11:59:59
is AM and 12:00:00-23:59:59 is PM.

Just curious....is the current mapping a deliberate choice or a bug?


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Carsten Dominik
Sterrenkundig Instituut "Anton Pannekoek"
Universiteit van Amsterdam
Kruislaan 403
NL-1098SJ Amsterdam
phone: +31 20 525 7477

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