How to display the current time in a different timezone than yours ?

To quote an example from the Superuser forum:

It’s 6pm in Taipei, what time is it here?

date --date='TZ="Asia/Taipei" 18:00'
Fri Jul 16 11:00:00 BST 2010

At 11am here in London, what time is it in Taipei?

TZ=Asia/Taipei date -d "11:00 BST"
Fri Jul 16 18:00:00 CST 2010

Source: https://superuser.com/questions/164339/timezone-conversion-by-command-line

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POSIX date format in Perl

To make a Perl script portable is to avoid using system commands as much as possible. To deal with date formats actions, you’d better use DateTime or Date::Calc modules.

For a simple formatting of the current date using localtime() Perl function :

#!/usr/bin/perl
use POSIX qw(strftime);
my $date = strftime “%d-%m-%y”, localtime;

Instead of :

my $date = qx(date +%d-%m-%y);

Both work. The first one is more Perlish 😉

More info :
POSIX Function strftime() in Perl
DateTime Perl module
Date::Calc Perl module