Solution : https://service.sap.com/sap/support/notes/1056623 (SAP Service marketplace login required)
Key words :
yyyy mm/dd/yyyy mm-dd-yyyy yyyy, dd yyyy/mm/dd yyyy-mm-dd, web dynpro abap, abap user profile, abap date formats, date formats, date input, date format, system supports, manual maintenance
Related Notes :
1098009 | Web Dynpro ABAP - List of known Restrictions and Browser Support |