Unable to read the timestamp of Zsh history

Problem: to understand the following timestamp

1241036430

at ~/.history

: 1241036336:0;vim ~/.zshrc
: 1241036379:0;vim ~/bin/HideTopBar
: 1241036421:0;ls
: 1241036430:0;cat ~/.history

when I have

setopt EXTENDED_HISTORY
HISTFILE=~/.history

in .zshrc.

How can you read the timestamp?

This simple util, called localtime is gold for reading files with timestamps:

#!/usr/bin/perl
# http://perl.plover.com/classes/mybin/samples/source/localtime

if ($ARGV[0] eq '-f') {
  *show_localtime = \&show_localtime_list;
  shift;
}

if (@ARGV) {
  for (@ARGV) {
    print show_localtime($_), "\n";
  }
} else {
  while (<>) {
    s/^(\d+)/show_localtime($1)/e;
    print;
  }
}


sub show_localtime {
  my $t = shift;
  scalar localtime $t;
}

sub show_localtime_list {
  my $t = shift;
  my @a = localtime $t;
  "@a\n"
}

• (There is also a little presentation :))

It handles lots of cases, and seem to understand both timestamps in seconds and mini-seconds, etc.

$ localtime < ~/.histfile
<snip>
: Sat Sep 17 05:55:17 2016:0;cat localtime