2009 G20 London summit a force for good in the medium term." Leaders of the member countries began to prepare for the London Summit months before the effective date, notably with two official meetings dedicated to that preparation, one held in Berlin, Germany, on 22 February 2009 for European leaders, and another in Horsham, Sussex, United Kingdom, on 14 March 2009 for Finance Ministers. Leaders of the four European Union member countries of the G20, the United Kingdom, Germany, France and Italy along with the two largest European non-members, Spain and the Netherlands, met in Berlin on 22 February 2009 to prepare for the
G20 group's chair rotates annually among the members and is selected from a different regional grouping of countries. The incumbent chair establishes a temporary secretariat for the duration of its term, which coordinates the group's work and organizes its meetings. The current chair of the G20 is Argentina, which took over the chair on 1 December 2017. The 2017 chair was Germany, which hosted the 2017 Summit in Hamburg. The 2019 chair will be Japan, which will host the 2019 G20 Osaka summit. In 2010, President of France Nicolas Sarkozy proposed the establishment of a permanent G20 secretariat, similar to the