My PPC 5021 shows 13th, Dec, 2014, 'Mon'.
It was overhauled Nov. 2013
Date fault can be happen due to mis-installation of gear.
Some watch show 31st, June
But day just moves everyday with no relation to Month and/or Date.
Watch have been in winder 3 weeks
So I don't know what happen.
It drives me anoying.
Service center is far from here.