Thanks to Info-ZIP for info on the DOS-time/date conversion code,
and some other general information gathered from their sources.

Thanks to these people for suggestions, testing, and bug reports:

Alexander Galanin <al@galanin.nnov.ru>
Alexandr Shadchin <alexandr.shadchin@gmail.com>
Andrew Brampton <brampton@gmail.com>
Coverity <info@coverity.com>
Del Merritt <del@alum.mit.edu>
François Simon <AT.GFI.Francois.SIMON@sesam-vitale.fr>
Heiko Hund <heiko@ist.eigentlich.net>
Jan Weiß <jan@geheimwerk.de>
Joel Ebrahimi <joel.ebrahimi@gmail.com>
Jono Spiro <jono.spiro@gmail.com>
Kohei Yoshida <kohei.yoshida@gmail.com>
Mikhail Gusarov <dottedmag@dottedmag.net>.
Oliver Kaiser <under.northern.sky@googlemail.com>
Pascal Terjan <pterjan@gmail.com>
Patrick Spendrin <ps_ml@gmx.de>
Paul Sheppard <shepsoft@googlemail.com>
Pierre Joye <pierre.php@gmail.com>
Rick Carback <carback1@umbc.edu>
Roberto Tirabassi <rtirabassi@3di.it>
Roland Ortloff <Ortloff.R@gmx.de>
Simon Talbot <simont@nse.co.uk>
Stephen Bryant <steve@bawue.de>
Tarmo Pikaro <tapika@yahoo.com>
Timo Warns <warns@pre-sense.de>
Tom Callaway <tcallawa@redhat.com>
Vassili Courzakis <vcoxvco@googlemail.com>
Wolfgang Glunz <Wolfgang.Glunz@gmx.de>