NATIONAL BANK OF GREECE S.A.

Press Release

Announcement Date & Time of 1^st Quarter 2013 Results

National Bank of Greecewill announce 1^st Quarter 2013 results, for the Bank and the Group, onFriday 24 May 2013, at17:00, Greek time (+2:00 GMT). A conference call for the presentation and discussion of results is scheduled to follow at17:30 Greek time the same day.

Athens, 23 May 2013