Date::Manip - date differences

denzil_cactus has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks !! I am facing issue with Data::Manip::ParseDate function on perl 5.10.1 as its adding extra one hour.

#!/usr/bin/perl
use Time::Local qw(timelocal timegm timegm_nocheck);
use POSIX qw(strftime);
use Date::Manip;

&dateTimeFormat;
sub dateTimeFormat
{

        my($iSec,$iMin,$iHour,$iMday,$iMon,$iYear,$iWday,$iYday,$iIsds
+t) = localtime(time);

        $iYear += 1900;
        $iMon++;

        my $tDate = sprintf('%04d-%02d-%02d',$iYear,$iMon,$iMday);
        my $tTime = sprintf('%02d:%02d:%02d',$iHour,$iMin,$iSec);

        my $cZone = strftime("%Z", localtime());

        my $cString = $tDate.$tTime.$cZone;
        my $cParsedate = ParseDate($cString);

        my $tNewdate = UnixDate($cParsedate, "%Y-%f-%d");
        my $tNewtime = UnixDate($cParsedate, "%H:%M:%S");

        my($tYear,$tMonth,$tDd) = split(/-/,$tNewdate);
        $tNewdate = sprintf('%04d-%02d-%02d',$tYear,$tMonth,$tDd);

        my($HH,$MM,$SS) = split(/:/,$tNewtime);
        $tNewtime = sprintf('%02d:%02d:%02d',$HH,$MM,$SS);

        my $cDatetime = $tNewdate." ".$tNewtime;

        print $cDatetime;

}
[download]

Below is the output of the program

[denzil@local ~]# perl 1.pl
2014-10-10 12:16:12
[denzil@local ~]# date
Fri Oct 10 11:16:13 GMT 2014
[root@cjjeiprodb ~]#
[download]

Can you please help me to fix this?

Comment on Date::Manip - date differences - one hour Select or Download Code

Replies are listed 'Best First'.
Re: Date::Manip - date differences - one hour by rnewsham (Curate) on Oct 10, 2014 at 11:56 UTC
It looks like its a timezone or daylight savings issue, on my system it works as expected. It might help if you examine the contents of $cZone.	[reply]
Re^2: Date::Manip - date differences - one hour by SBECK (Chaplain) on Oct 10, 2014 at 13:52 UTC
It's definitely a daylight saving time issue. If you read the Date::Manip::Problems document, it's one of the problems mentioned. Also, if you run Date::Manip 6.30 or newer, it'll generally show you the answer you 'expect'.	[reply]
Re: Date::Manip - date differences - one hour by ikegami (Patriarch) on Oct 10, 2014 at 15:13 UTC
What are you trying to do?! It's a minor miracle that `ParseDate` can handle something like `2014-10-1008:11:02PDT` at all! You should have better luck using `%z` than semi-meaningless `%Z`. Do you also have the problem with `%z`? Maybe you have a misconfigured system. Today, `perl -MPOSIX -E'say strftime("%z", localtime)'` should return `+0200` for Swedes.	[reply] [d/l] [select]
Re^2: Date::Manip - date differences - one hour by denzil_cactus (Sexton) on Feb 25, 2015 at 04:44 UTC
Thanks for your input guys!! I just set this export TZ=GMT and it worked Got the help from http://www.perlmonks.org/bare/?node_id=289914 If you are your application from cron then TZ=GMT needs to be set in the cron daemon.	[reply]