This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open Desktop or Openserver.

There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

Unix, Xenix and ODT General FAQ

How can I find tomorrow's or yesterday's date in a script?

/>datemath.tgz is available from ftp://ftp.jpr.com , that gives you the ability to do (for example):

 datecalc + 1
 

and get tomorrow's date. There are shell and awk scripts for various date related tasks.

If running Linux, "date --date=tomorrow" is a simple way to do it. On Mac OS X, you could do:

x=`date +%s`
date -r `expr $x + 86400`

It's all a lot easier with Perl. See http://aplawrence.com/Bofcusm/1455.html and http://aplawrence.com/Unix/yesterday.html also.

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Tue Mar 21 08:23:48 2006: Subject:   anonymous


I see only script for yesterday date.
Why no one post about how to find tomorrow date?



Tue Mar 21 14:35:45 2006: Subject:   BigDumbDinosaur


I see only script for yesterday date. Why no one post about how to find tomorrow date?

Try carefully reading the entire page, bucko. The answer is right there in front of you. Geesh!



Thu Apr 30 20:27:26 2009: Subject: Implementation in OS X   BenKershner


You can one line it in OS X:
date -r $(expr $(date +%s) + 86400)

... to which you can add date arguments:
date -r $(expr $(date +%s) + 86400) +%y%m%d

... yielding tomorrow's date in YYMMDD format. Yesterday could be found by subtracting 86400, and multiples thereof.



Fri May 1 16:37:02 2009: Subject:   TonyLawrence


Ayup, that's nice, thanks.

(though it really is better if you read the WHOLE article before jumping to make a comment that's already in there!)

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