• September 6th, Governing Council meeting of the European Central Bank in Frankfurt with a press conference to follow. ECB President Mario Draghi is expected to discuss how the ECB will help lower Spanish and Italian borrowing costs.
• September 12th, Germany's Constitutional Court is expected to rule on the new eurozone bailout fund and fiscal treaty.
• Mid-September: Euro-zone finance ministers' informal meetings in Nicosia
• October 8th, Finance Ministers meeting in Luxembourg
• European Council meeting, October 18th and 19th in Brussels.
And in the US:
• (Not key) Political conventions: Republicans August 27–30 in Tampa, and Democrats September 3–6 in Charlotte. The election is on November 6th.
• September 12th and 13th: the Federal Open Market Committee (FOMC) meets. After this meeting the FOMC will release updated Summary of Economic Projections, and Fed Chairman Ben Bernanke will hold a press conference. Major economic releases before the FOMC meeting: August 29th, second estimate of Q2 GDP, and September 7th, the August employment report.
Source: http://www.calculatedriskblog.com/2012/08/europe-and-us-few-misc-dates-in.html#sXiGBSJZLGlWhsBC.99