Monday Prime Minister Costas Karamanlis to meet with his counterpart from Moldova, Zinaida Greceanii, at 1 p.m. Employees at the National Bank of Greece hold a 24-hour strike to demand a collective labor agreement. Cypriot Defense Minister Costas Papacostas visits Athens. He is due to meet with Defense Minister Evangelos Meimarakis at 11 a.m. To tomorrow. Wednesday The Aristotle University of Thessaloniki is hosting the 13th conference «Recent Developments in Gravity,» starting at 5 p.m. at the Philippio Hotel in Thessaloniki. To Friday. For details, log on to www.astro.auth.gr. The Bar Associations of Greece, in collaboration with the Technical Chamber of Greece and Kathimerini newspaper, hosts a conference on «The Land-Zoning Plan and the Protection of the Natural Environment,» at 7 p.m. at the National Bank of Greece (82-84 Aeolou). For further details, log on to www.dsa.gr. On the occasion of the World Environment Day, UNICEF Greece holds a special event to present UNICEF’s international initiatives to deal with the impact of climate change on children. Foreign Minister Dora Bakoyannis will speak. At 1 p.m. at the Ianos bookstore. Thursday World Environment Day. Hellenic Radio & Television (ERT) is hosting an event titled «Reconsider the Environment,» in an effort to raise people’s awareness on the environment and climate change. For further details, call 210.740.7070. The University of Macedonia is hosting a three-day conference on «The Holocaust as Local History: The Past and Present of a Complex Relationship,» at the university’s premises in Thessaloniki. To Sunday. For further information, log on to www.uom.gr. Panteion University is hosting an international conference on «Dealing with Modern Crime and Criminology,» at the university. To Saturday. For details, log on to http://criminology.panteion.gr. Friday French President Nicolas Sarkozy pays an official visit to Athens. Saturday A European Left (EL) conference on «Developments in the Balkans» begins at the Helexpo grounds in Thessaloniki. President of the Coalition of the Radical Left (SYRIZA) Alexis Tsipras and vice president of the EL Party Graziella Mascia to speak. To Saturday. Justice Minister Sotiris Hatzigakis to address a symposium on «Corruption in the Public Sector,» hosted by the Athens Bar Association in Karytaina, Arcadia.