Monday Doctors at state hospitals in Attica are due begin a five-day strike, protesting their working hours and the government’s alleged lack of investment in health services. Prime Minister Costas Karamanlis visits Croatia, Slovenia and Serbia. To tomorrow. PASOK leader George Papandreou visits Naoussa prefecture. Transport Minister Michalis Liapis to meet with representatives of KTEL intercity buses to discuss fare increases for 2007. Art Culture and the Byzantine and Christian Museum open an exhibition on «Salvador Dali: The Myth of Surrealism,» at the museum. Culture Minister Giorgos Voulgarakis will inaugurate the exhibition, which will run through March 24. For details, log on to www.culture.gr. The US Embassy in Athens will remain closed today in observance of Martin Luther King Junior Day, a US national holiday. The Chamber of Environment and Sustainability and the Greek Ecological Organization Network (PANDOIKO) hold a conference on the planned amendments to the Constitution at the expense of the environment, at 7 p.m. at the offices of the General Confederation of Greek Labor (GSEE), 69 Patission. Tel. 210.382.3850. Tuesday OTE telecom workers in the Serres and Kilkis prefectures stage a 24-hour strike opposing the company’s further privatization. The Association for the Modernization of Society (OPEK) holds a conference on «Democracy in Crisis,» at 7.30 p.m. in the amphitheater of the National Bank of Greece, 82-84 Aeolou. Former Prime Minister Costas Simitis to speak. Tel. 210.362.5295 or log on to www.opek.gr. Wednesday European Organization for Strategic Planning holds a conference on «The Challenges for Germany’s EU Presidency,» in cooperation with the City of Athens, at 5.30 p.m. in Zappeion Hall. Tel. 210.339.2460 or log on to www.eosp.gr. The Hellenic Federation of University Teachers’ Associations (POSDEP), the Federation of Secondary School Teachers (OLME) and the Greek Primary School Teachers’ Association (DOE) stage a 24-hour strike opposing the government’s decision to amend Article 16 of the Constitution. Thursday Hospital doctors outside Attica to stage a 48-hour strike opposing the government’s proposal for new hospital work hours and duty rosters. The Earthquake Planning and Protection Organization (EPPO) holds a conference on «Earthquake Protection,» at 6 p.m. at Aristotle University in Thessaloniki. Tel. 210.672.8000 or log on to www.oasp.gr. Saturday The Institute of International Relations (IDIS) holds a round-table discussion on «Regional Challenges for World Security,» at noon at the Hilton Hotel. Tel. 210.331.2325 or log on to www.idis.gr. The Institute of International Relations (IDIS) holds a conference on «Turkey Today and the Course of Greek-Turkish Political and Economic Relations,» at noon at the Hilton Hotel. PASOK MP Theodoros Pangalos to speak. Tel. 210.362.0274 or log on to www.sae-epe.gr.