yesterday's date

[Catherine Forget]

Hi,

Is there an easy way to get yesterday's date (yyyymmdd)with the date command?
Thanks

[Steven E. Protter]

A. Clay Stephenson's date program comes to mind.
http://www.hpux.ws/merijn/caldj-2.3.sh

Perl
http://www.hpux.ws/merijn/caldj-2.2.pl

SEP

[A. Clay Stephenson]

You can do tricks with the TZ environment vaiable but the behavior is only defined in the range 0-24 so if your hour offset falls outside that range the behavior may work or it may not and could break at the next patch. It might also work for some timezones and not others. If you want something that will work everywhere then:

YESTERDAY=$(caljd.sh -s -y $(caljd.sh -p 1))
echo "Yesterday was ${YESTERDAY}"

Invoke as caljd.sh -u for full usage.

[Hazem Mahmoud_3]

Here is a portion of a script that I used before. I'm almost certain there's a better way of doing it, but just another option and it might give you some ideas:

chop($day = `date \"+%d\"`);
chop($month = `date \"+%m\"`);
chop($year = `date \"+%y\"`);
$prevday = $day - 1;
if ($prevday == 0) #if first of month
{
if (($month==1) || ($month==3) || ($month==5) || ($month==7) || ($month==8) || ($month==10) || ($month==12))
{
$prevday = 31;
}
else
{
$prevday = 30;
if ($month == 2)
{
$prevday = 28;
}
}
}
if ($prevday =~ /^\d{1}$/) #format day to be 2 digits
{
$prevday = "0$prevday";
}


-Hazem

[Nicolas Dumeige]

(with oracle : select to_char(sysdate-1,'yyyymmdd') from dual;)

[Hein van den Heuvel]

perl -e '$yesterday = localtime(time-24*60*60),print "$yesterday\n"'

perl -e '$yesterday = localtime(time-86400),print "$yesterday\n"'

[H.Merijn Brand (procura]

From the FAQ at my site:

--8<---
How do I print Yesterday?

d3:/ 102 > echo 'Yesterday'
Yesterday
d3:/ 103 > perl -le 'print scalar localtime time - 86400'

Or use A.Clay Stephenson's date hammer, which can also be used for more complicated actions from the command line, as will using the modules Date::Calc or Date::Manip with Perl.
-->8---

my HP ITRC site pages can be found at

Singapore https://www.beepz.com/personal/merijn/#FAQ
Rotterdam http://www.cmve.net/~merijn/#FAQ
Seattle http://www.hpux.ws/merijn/#FAQ

And it also hosts caldj - both versions - in the last section of the page

Enjoy, have FUN! H.Merijn

[Francisco J. Soler]

Hi Catherine,
If you download the date command from gnu coreutils the yesterday's date is very easy to obtain,

date --date yesterday +%F
you get the date in yyyy-mm-dd
or
date --date yesterday %Y%m%d
you get the date in yyyymmdd

I've tried with some tricky dates like:
date --date '01 march 2004 1 day ago'
and
date --date '01 march 2003 1 day ago'
and
date --date '01 Jan 2003 1 day ago'
and so on, the result is good.

You can download the date command from gnu coreutils from the software porting center:
http://hpux.cs.utah.edu/hppd/hpux/Gnu/coreutils-5.2.0/

Frank.

[Francisco J. Soler]

Hi again,
I've made a mistake the sentence:
date --date yesterday %Y%m%d
must be
date --date yesterday +%Y%m%d

sorry
Frank.

[V.Tamilvanan]

Hi,

Look into this below link.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=222968

[Catherine Forget]

Hi Steven,
The link you gave me :
http://www.hpux.ws/merijn/caldj-2.3.sh
is not accessible. Is there another way to get the script?

Thanks very much

[H.Merijn Brand (procura]

Any of the other two of my site should do:

My HP ITRC site pages can be found at

Singapore https://www.beepz.com/personal/merijn/caldj-2.3.sh
Rotterdam http://www.cmve.net/~merijn/caldj-2.3.sh
Seattle http://www.hpux.ws/merijn/caldj-2.3.sh

Enjoy, have FUN! H.Merijn

[H.Merijn Brand (procura · Accepted solution]

Sorrrrry. The file was misnamed on the server.

All links should work again in a few hours. cmve is correct again

Enjoy, Have FUN! H.Merijn [ don't forget about the etiquette and assign point to _all_ answers. 0 is better than not assigned ]

[RAC_1]

YESTERDAY=$(TZ=$(date +%Z)+24; date '+%b %e')

Anil

[H.Merijn Brand (procura]

Sorry to A.Clay!

I have now corrected *all* misspelled references to caljd.sh, caljd.pl, caljd-2.3.sh, caljd-2.2.pl, and caljd-2.2.sh on my site

Most were spelt as caldj :(

Catherine, please do not Forget to assign points to _all_ posts. 0 (or no) points is OK, but don't leave them unassigned.

Enjoy, Have FUN! H.Merijn