From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Brand <michael.ch.brand@gmail.com>
Subject: Re: Plotting (with gnuplot) using dates timestamps
Date: Mon, 26 Mar 2012 16:06:08 +0200
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References: <E6687F9A-273E-4953-B411-BFF696374F93@polytechnique.org>
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To: Alan Schmitt <alan.schmitt@polytechnique.org>
Cc: emacs-orgmode Mode <emacs-orgmode@gnu.org>

Hi Alan

On Mon, Mar 26, 2012 at 15:37, Alan Schmitt
<alan.schmitt@polytechnique.org> wrote:
> I'm trying to plot the following table, but the dates part is all wrong. =
Is there a way to tell gnuplot what the date format is?
>
> #+tblname: data-table
> | Date =A0 =A0 =A0 =A0 =A0 =A0 | =A0 =A0 HP | =A0 =A0 HC |
> |------------------+--------+--------|
> | [2011-08-20 Sat] | 006815 | 008399 |

Did you try this?
set timefmt  "[%Y-%m-%d"

Michael