What is the birthdate of this Dutch professional football manager and former player, who was a new signing for the 1998-99 FC Barcelona season?
1998–99 FC Barcelona season: During the 1998–99 FC Barcelona season, the club once again retained the La Liga title, but eliminated by Valencia in the round of 16 of Copa del Rey. 1998–99 FC Barcelona season:  Barcelona enjoyed a great season with their new signings Ronald de Boer, Patrick Kluivert, Frank de Boer, Mauricio Pellegrino, Boudewijn Zenden and Phillip Cocu. Phillip Cocu: Phillip John-William Cocu (] ; born 29 October 1970) is a Dutch professional football manager and former player, currently coaching PSV.
29 October 1970