I think it is a release date, 03 12 could mean 03/12(Day/Month)=12/03/2013 which is a Tuesday which is when games are released or 03/12/(Month/Day)
01, 02, 03, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 12, 13, 14
01, 02, 03, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 12, 13, 14
01, 02, 03, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 12, 13, 14