My overall first impression is that this is pretty good code - subdivided into subroutines, nicely formatted, etc. It could be compacted / made mode "Perlish" in a couple places, but because TIMTOWTDI and the code is still clean and pretty easy to follow, I think it's fine the way it is. Just a few other issues / comments:

• Most importantly, you're using the system function with a single argument and with user input (command-line arguments), which is vulnerable to injections, and you're not checking the calls for errors. See Calling External Commands More Safely for alternatives.
• opendir also needs to be checked for errors, and it's better to use lexical file/dir handles, as in opendir(my $dh, $path) or die "$path: $!";.
• Instead of your sub pad, you can use sprintf, as in sprintf("%02d", $num).
• I would suggest you take the time to study Time::Piece and/or DateTime instead of the basic localtime stuff you're doing here, I think you'll be much happier in the long run.
• You may also want to consider looking into Getopt::Long to pass arguments to the script instead of a plain list of arguments. IMHO it makes for much more readable script invocations.
• Unless you're certain this will only ever be run on *NIX, you probably want to consider using a module for your filename manipulations. Personally I like Path::Class.
• Now we're getting very nitpicky, but do you really need to provide two different date formats? For things like this I'd always stick to YYYY-MM-DD.

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.