When was Muammar Gaddafi died

Muammar Gaddafi was the president of Libya.
Real name - Muammar Muhammad al-Gaddafi
Place o birth - Sirt, Italian Libya
Date of birth - 7 June 1942Moatessem-Billal, Hannibal, Saif al-Arab, Khamis, Ayesha, Hanna
Death - 20 october 2011.