There are new country codes RS for Serbia and ME for Montenegro. http://www.iso.org/iso/en/prods-services/iso3166ma/03updates-on-iso-3166/nlv... I would suggest the following changes: In zone.tab Change the line: CS +4450+02030 Europe/Belgrade to: RS +4450+02030 Europe/Belgrade Add: ME +4247+01928 Europe/Podgorica In europe Add: Link Europe/Belgrade Europe/Podgorica Mark