High Quality Content by WIKIPEDIA articles! Modern pentathlon competitions at the 2012 Summer Olympics in London are scheduled to be held on Saturday 11 August and Sunday 12 August 2012. The men`s and women`s events will each involve 36 athletes. Venues for the events will be the Handball Arena, for fencing, the Aquatics Centre in Olympic Park for swimming and Greenwich Park, for the riding and combined running and shooting discipline.