I'm afraid I am too late, the discussion seems to be finished... But if somebody looks at it again,
-- what was the question exactly?
1) why doesn't this long code snippet work, or
2) smth. wrong with passing 0 or 00 to this class?
I mean, can somebody narrow this down to smth. like this:

use DateTime;
$datetime=Time->new( year   => 2005,
                     month  => 5,
                     day    => 5,
                     hour   => 0,
                     minute => 13,
                     second => 00 );
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,or am I missing the point (as ususal)?
PS: I'd love to comment, have a couple of ideas, but cannot play with / reproduce this, -- apparently I don't have this module.....