Antonio Argüelles Díaz-González, born in Mexico City, Mexico, on 15 April 1959, became the oldest person to complete the Oceans Seven open water swimming challenge on 3 August 2017, when, aged 58 years 110 days, he swam the North Channel between Northern Ireland and Scotland in 13 hours 32 minutes 32 seconds.The Oceans Seven, the open water swimming community's equivalent of the Seven Summits, was first proposed by Steven Munatones of the World Open Water Swimming Association and consists of the following waterways around the world: the North Channel between Northern Ireland and Scotland, the Cook Strait between the North and South Islands of New Zealand, the Molokai Channel between Oahu and Molokai Islands in Hawaii, the English Channel between England and France, the Catalina Channel between Catalina Island and the Southern California mainland, the Tsugaru Channel between the islands of Honshu and Hokkaido in Japan and the Strait of Gibraltar between Europe and Africa.Argüelles had previously swum the English Channel on 3 September 1999 (in 18 hours 19 minutes) and on 6 September 2009 (12 hours 54 minutes), the Catalina Channel on 12 July 1999 (12 hours 25 minutes 43 seconds), on 13 October 2008 (13 hours 10 minutes 30 seconds) and on 13 July 2009 (10 hours 25 minutes 2 seconds), the Strait of Gibraltar on 2 July 2015 (4 hours 23 minutes), the Tsugaru Channel on 15 September 2015 (12 hours 38 minutes), the Molokai Channel in March 2016 (23 hours 18 minutes) and the Cook Strait on 19 March 2017 (11 hours 20 minutes).