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.
2015 Formula 4 Sudamericana season The 2015 Fórmula 4 Sudamericana Championship season is the second season of the Formula 4 Sudamericana. It will begin on 24 May at the Autódromo Victor Borrat Fabini "El Pinar" in Uruguay, and will finish on 8 December at the Autódromo Internacional Ayrton Senna in Brazil, after eight rounds.