Monday President Karolos Papoulias visits Thessaloniki to attend a series of events commemorating the city’s liberation from Ottoman rule as well as celebrations for «Ochi Day» (October 28), the national holiday marking Greece’s refusal to allow Axis troops to enter Greece in 1940. Labor Minister Andreas Loverdos to meet with the president of the Rio and Xanthi casinos, Costas Piladakis, as well as casino unionists. Tuesday Two «Word Express» literature evenings, featuring writers and poets from the Balkans, will take place today and tomorrow at the Underground Entefktirio venue in Thessaloniki. The events are hosted by the British Council and the Entefktirio literary journal, and start at 8.30 p.m. For further information, call 2310.283.223. Wednesday «Ochi Day» public holiday. Student and military parades are expected to take place across the country. Thessaloniki hosts a series of events today and tomorrow to welcome activists participating in the the World March for Peace and Nonviolence, which started on October 2 in New Zealand and is organized by the international organization World without Violence. The march will end in Argentina on January 2. For further details, visit Thursday The 25th International Tourism Exhibition Philoxenia 2009 starts at the Helexpo fairgrounds in Thessaloniki through Sunday. Call 2310.291.293 or visit The 30th annual Greek cardiologist conference will take place in Athens through Saturday. For details, visit The Center for Renewable Energy Sources (CRES) hosts a six-day seminar on «Renewable Energy Sources and Desalination Technologies,» starting at 9 a.m. at the Agricultural University of Athens. To November 3. For further information, call 210.660.3302 or log on to Foundation of the Hellenic World is hosting the fifth international conference titled «Advances in Computer Entertainment Technology 2009,» along with a conference titled «Digital Interactive Media and Arts 2009.» Both will take place at the Hellenic Cosmos cultural center through Saturday. For further information, call 212.254.0444 or log on to Friday The «Solid Waste Management: Toward a Zero-Waste Society» conference is to take place at the Eugenides Foundation. To tomorrow. For further information, call 210.772.4274 or log on to Conference «Travel & Tourism: The Day After – Turning Crisis into Growth» begins at the Helexpo fairground in Thessaloniki. Organized by Helexpo and the European Media Group, it continues tomorrow. For further information, visit or