Table:
text: Thomas Hitzlsperger
International goals
International goals
Date_ Venue Score Result_ Competition
6 September 2006 Stadio Olimpico , Serravalle , San Marino 9–0 13–0 UEFA Euro 2008 qualifying
6 September 2006 Stadio Olimpico , Serravalle , San Marino 11–0 13–0 UEFA Euro 2008 qualifying
6 June 2007 AOL Arena , Hamburg , Germany 2–1 2–1 UEFA Euro 2008 qualifying
17 November 2007 Allianz Arena , Munich , Germany 4–0 4–0 UEFA Euro 2008 qualifying
6 February 2008 Ernst-Happel-Stadion , Vienna , Austria 1–0 3–0 Friendly
6 September 2008 Rheinpark Stadion , Vaduz , Liechtenstein 5–0 6–0 2010 FIFA World Cup qualifying

Question: On which date did Thomas Hitzlsperger's friendly take place?