{
    local $ENV{TZ} = "EST+05";
    print "In New York, it is ".localtime()."\n";
}

{
    local $ENV{TZ} = "IST-05:30";
    print "In Mumbai, it is ".localtime()."\n"
}

##</code><code>##

In New York, it is Mon Dec 19 14:25:01 2005
In Mumbai, it is Tue Dec 20 00:55:01 2005