I know that you already have this solved, but I was looking around for 
alternate solutions and ran across something that is a standard KDE item 
and has been on my system forever, but I've never used it.  Have you 
tried using kalarm?  It appears to do exactly what you are looking for 
without all the "at" stuff.  It will allow you to have an audible alarm, 
desktop notification, send an email or run a command at whatever 
time/date you want, with or without it reoccurring.  You can even setup 
templates so if you do have some complicated command that you would like 
to run that you can set it up quickly the next time to use it.

Brian Cluff

On 01/05/2014 12:29 AM, joe@actionline.com wrote:
> What would y'all suggest is the best way to set up date,
> time, and/or task reminders to display on my desktop?
>
> Ideally, I would like small notes to pop-up (perhaps top
> left corner of my desktop) with specified lead time showing
> the date, time, and task title for each item that I schedule.
>
>
>
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