Here is the list... please add to it if you can think of anything:
Sep. 11 - 8th Anniversary of 9/11/01; Javier Solana heads EU-South Africa summit in Cape Town
Sep. 17 - Javier Solana begins trip to U.S. (is staying for one week)
Sep. 18 - Rosh Hashana begins
Sep. 21 - G-20 Summit opens with interfaith prayer service
Sep. 24 - Obama presides over the UN Security Council; Quartet (US, EU, UN, Russia) meet over Middle East peace process; Obama then heads to Pittsburgh for the G-20 Summit
Sep. 25 - 50,000 Muslims pray/protest at the U.S. Capitol (largest gathering of U.S. Muslims ever??); Javier Solana heads back to Europe; G-20 Summit ends
Sep. 28/29 - Javier Solana meets with EU defense ministers
Oct. 2 - Ireland's referendum of the Lisbon treaty (the last obstacle to Lisbon ratification, minus Klaus' signature)
Oct. 5 - Hearing to decide whether or not to let a case proceed that requires Obama to release his long-form birth certificate
Oct. 18 - Javier Solana's term ends