MONDAY President of the Republic Karolos Papoulias to attend the annual assembly of the Youth Parliament. Culture Minister Pavlos Geroulanos to pay an official visit to Israel. US Embassy in Athens and its consular section, the US Consulate General in Thessaloniki and US government offices in Greece will be closed in observance of Labor Day, an official US holiday. The Foundation for Research and Technology holds a conference on «Computer Vision 2010» to take place at the Creta Maris Hotel in Hersonissos, Crete. The conference runs through Saturday. Log on to www.ics.forth.gr The chairman of state betting company OPAP, Haris Stamatopoulos, holds a press conference to present company’s new outlook and promotional strategies. At 12.30 p.m. at the OPAP headquarters, 62 KIfissou, Peristeri, Athens. The annual Armata Festival kicks off on the Argosaronic island of Spetses and will run through Sunday. The festival’s highlight is on Saturday with the reenactment of the historic Greek-Turkish ship battle took place on September 8, 1822, during which a life-sized Turkish flagship is set on fire. The weeklong celebrations include concerts, exhibitions and many impressive events for young and old alike. Log on to http://armata.2spetses.gr. An autumn bazaar featuring school supplies and household items will take place from September 6 to 18 in Korai Square in Piraeus and Aghios Antonios Square in Peristeri and from September 6 to 12 at the Syntagma metro station. Run by the volunteer organization «Smile of the Child» (Hamogelo tou Paidiou), the bazaars aim to raise money to help children in need. Call 210.330.6140. TUESDAY University of Athens to hold a conference on «Medical Education with Simulators: Quo Vadis?» Starting at 3.30 p.m. at the Hilton Hotel. Contemporary international trends in medicine will be explored. For further information, log on to www.uoa.gr. The board of the General Confederation of Greek Labor (GSEE), Greece’s main association of private sector unions, to meet with New Democracy opposition party leader Antonis Samaras. WEDNESDAY Doctors of the World holds a press conference at 12.30 p.m. at the Ianos bookstore (24 Stadiou) to present the program of the concert they will host on September 24 in Petroupolis, western Athens, for the organization’s 20-year anniversary. The 45th Demetria Festival kicks off in Thessaloniki. Running through November 26, the festival includes, concerts, theater performances, visual arts exhibitions and much more. THURSDAY President Karolos Papoulias and Bulgarian President Georgi Parvanov to inaugurate the new Ivailovgrad-Kyprinos checkpoint on the Greek-Bulgarian border. Doctors without Borders holds a press conference to present its forthcoming photography exhibition, «Images of a Mission.» The exhibition is to open on Monday, September 13, at The Art Foundation (TAF) in Monastiraki and will run to September 19. Info: www.msf.gr SATURDAY The 75th Thessaloniki International Fair opens at the Helexpo fairgound in Thessaloniki and will run through September 19. At 8 p.m., Prime Minister George Papandreou will make the opening speech. Parallel events include conferences, concerts, exhibitions, children’s events and more. To September 19. Log on to www.helexpo.gr. On the occasion of the 75th Thessaloniki International Fair, a protest rally by trade unions is to take place at 6 p.m. SUNDAY Prime Minister George Papandreou holds a briefing at noon at the Ioannis Vellidis Conference Center at the Helexpo fairground in Thessaloniki.