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From: <tomas@tuxteam.de>
To: Christopher Howard <christopher@librehacker.com>
Cc: Help Gnu Emacs Mailing List <help-gnu-emacs@gnu.org>
Subject: Re: calculating relative time until a day of week
Date: Sun, 7 Jul 2024 07:10:48 +0200	[thread overview]
Message-ID: <ZoojWPDTCjaITTGB@tuxteam.de> (raw)
In-Reply-To: <87v81itfvs.fsf@librehacker.com>

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On Sat, Jul 06, 2024 at 12:38:47PM -0800, Christopher Howard wrote:
> Hi, I want to make an Emacs timer that runs a command once a week, every Tuesday at 4am. I could do this with run-at-time and a relative time, but I would need to calculate how many seconds until Tuesday 4am. Is there an easy way to calcuate that?

  (time-subtract (date-to-time "2024-11-13T10:22:00+0100")
                 (current-time))

Note that Emacs's internal time representation is "abstract" -- you
shouldn't rely too much on its details. But you have a set of functions
to operate on it and to move from/to human readable representations.

See all the chapters on time in Elisp's "System Interface" section,
especially "42.8 Parsing and Formatting Times" and "42.10 Time
Calculations".

Cheers
-- 
t

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  reply	other threads:[~2024-07-07  5:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-06 20:38 calculating relative time until a day of week Christopher Howard
2024-07-07  5:10 ` tomas [this message]
2024-07-08  1:05 ` Michael Heerdegen via Users list for the GNU Emacs text editor
2024-07-08 18:00   ` Emanuel Berg

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