Bids for the 2020 Summer Olympics (London 2012). Out of the six bidders, Tokyo had previously hosted the Summer Olympic Games in 1964. The other four bidders have made bids in the past. It is the first time in 20 years that no city in the Americas bid to host the Summer Olympic Games. Rio de Janeiro was awarded the 2016 Summer Olympics. Baku and Doha bid for the 2016 Games but failed to become candidate cities, while Tokyo and Madrid also bid for the 2016 Games and became candidate cities. The IOC voted to select the host city of the 2020 Summer Olympics on 7
Bids for the 2012 Summer Olympics bid is announced. Following the announcement of the host city, the successful bid delegation signs the "Host City Contract" with the IOC, which delegates the responsibilities of the Games organisation to the city and respective NOC. The deadline to submit applications for the 2012 Summer Olympic Games was 15 July 2003. The nine cities that submitted bids before that date also met the 15 January 2004 deadline for submission of the first phase questionnaire. Through analysis of the questionnaires, the IOC gave a weighted-average score to each city based on the scores obtained in each of the questionnaire's eleven themes: