What is the beginning date of this inaugural season of a new FIA Champoinship for electrically powered cars, in which the Buenos Aires ePrix was first raced?
2014–15 Formula E season The 2014–15 FIA Formula E season was the inaugural season of a new FIA championship for electrically powered cars. It began on 13 September 2014 at Beijing in China and finished on 28 June 2015 in London after eleven races. Nelson Piquet Jr. came first in the overall standings, and so became the first ever Formula E champion.
2016 6 Hours of Silverstone The 2016 6 Hours of Silverstone was an endurance sports car racing event held at the Silverstone Circuit in Northamptonshire, England on 15–17 April 2016. Silverstone served as the opening round of the 2016 FIA World Endurance Championship, and was the fifth running of the event as part of the championship. 52,000 people attended the race weekend.