THURSDAY Prime Minister Costas Karamanlis to meet with Merchant Marine Minister Giorgos Voulgarakis at 10 a.m. At noon he will have talks with New Democracy MP Miltiadis Evert. Foreign Minister Dora Bakoyannis attends meeting of foreign ministers of the Black Sea Economic Cooperation (BSEC) in Ankara. PASOK leader George Papandreou visits Thessaloniki. Merchant Marine Minister Giorgos Voulgarakis meets with Piraeus Mayor Panayiotis Fassoulas. Culture Minister Michalis Liapis visits Ancient Olympia. He will meet with representatives of local authorities to discuss the course of the reconstruction works after the forest fires. Livanis Publications to present the new book by Agricultural Development Minister Alexandros Kontos at noon at the Stoa tou Vivliou. Minister of State Theodoros Roussopoulos to speak. Tel. 210.366.1212. FRIDAY The Chamber of Cephalonia and Ithaca hosts a conference titled «Promotion and Diffusion of Renewable Energy Sources and Energy Saving on European Islands,» starting at 9.30 a.m. at its premises. For details, log on to www.cres.gr. A two-day symposium titled «Breast Screening» begins at 1 p.m. at the Titania Hotel in Athens. To Sunday. Tel. 210.523.8777 or log on to www.xrayonline.gr. SATURDAY Clocks throughout the European Union and candidate countries will change back to winter time. At 4 a.m. local clocks will be turned back to 3 a.m. President Karolos Papoulias to attend events for the 50-year operation of the University of Macedonia in Thessaloniki. Merchant Marine Minister Giorgos Voulgarakis to inaugurate the 29th International Shipping Exhibition at 6.30 p.m. at the former Athens Airport at Hellenikon. The exhibition will run through November 4. Vita magazine hosts a conference titled «Osteoporosis,» starting at 11 a.m. at the Athens Concert Hall. Tel. 210.365.8600. SUNDAY Public holiday commemorating October 28, 1940, when Greece entered World War II on the side of the Allies.