Bug 17922: Use correct number of digits when replacing date placeholders

Bug 17922: Use correct number of digits when replacing date placeholders

This patch also fixes a typo ("<<MM><" should be "<<MM>>")

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 95e94766af653de4bc721af64981140cacecf567)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
(cherry picked from commit fdf1f974770247dc4b8decfb3318e31b940be48d)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>