When was the prince who attended NHH Symposium with The Norwegian king, Harald V  born? 
NHH Symposium:  The Norwegian king, Harald V attended in 1995 and +Haakon, Crown Prince of Norway in 2007 and 2009. Haakon, Crown Prince of Norway: Haakon, Crown Prince of Norway (] ; Haakon Magnus; born 20 July 1973) is the only son and younger child of King Harald V and heir apparent to the throne of Norway.
20 July 1973