From the discussion, it seems that for some weird reason, you get different results in the mtime field of stat than you expect.

How are you building your expectation of what is correct?

The following program should output the correct mtime for each file, which should be identical with what the OS thinks, as verified via dir:

use strict;

for my $file (@ARGV) {
    print "Checking '$file'\n";
    if( -f $file ) {
    
        system("dir $file");
        my $mtime= (stat($file))[9];
        print "Mtime: $mtime\n";
        print "As string: " . localtime($mtime);

    } else {
        print "File '$file' does not exist, skipping\n";
    };
};

__END__
Checking 'tmp.pl'
 Volume in Laufwerk Q: hat keine Bezeichnung.
 Volumeseriennummer: 5A02-C2B6

 Verzeichnis von Q:\

06.11.2014  12:01               336 tmp.pl
               1 Datei(en),            336 Bytes
               0 Verzeichnis(se), 956.154.372.096 Bytes frei
Mtime: 1415271660
As string: Thu Nov  6 12:01:00 2014

[download]

Ideally, you should always find that the output of the timestamps as reported by dir are identical to the output of the timestamp as found via $mtime and output via localtime.

In reply to Re: comparing 2 file time date stamps by Corion
in thread comparing 2 file time date stamps by craigt

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.