Thursday Prime Minister Costas Karamanlis begins a visit to Washington. To Sunday. Professional Accountants of Athens and Piraeus stage a 24-hour strike demanding better conditions and more pay. Public Order Minister Giorgos Voulgarakis visits Bulgaria. To tomorrow. Deputy Defense Minister Vassilis Michaloliakos meets with his Hungarian counterpart Imre Ivancsik. Defense Minister Anastassis Papaligouras visits Cyprus. To tomorrow. Transport Minister Michalis Liapis and Defense Minister Spilios Spiliotopoulos visit airport at Pachi, Megara. Canadian Embassy, in cooperation with the Forestry Directorate of Agriculture Ministry, holds a forest-firefighting seminar to be held at 9 a.m. at the Forest Research Institute in Ilissia, Athens. Tel. 210.727.3351. Judicial officials stage a one-hour work stoppage from noon to 1 p.m. protesting the Justice Ministry’s new regulations on justice issues. Tourism Minister Dimitris Avramopoulos holds a press conference at noon at the ministry. Deputy Development Minister Yiannis Papathanassiou meets with diary industry representatives. Trade exhibition «Thraki 2005» opens at the Exhibition Center of the Industrial Region in Komotini. Development Minister Dimitris Sioufas will make the opening. To Sunday. Tel. 2310.291.558 or log on to www.tif.gr. Film Archive of the Foreign Ministry holds a two-day symposium on «History and Policy in the Work of Pantelis Voulgaris,» to be held at 5.30 p.m. at the the ministry. To tomorrow. Andreas G. Papandreou Foundation holds a conference on «EU Policy on Drugs,» to be held at noon at the European Parliament Bureau in Greece. Tel. 210.322.0880. Friday Hospital doctors across the country stage a 24-hour strike over financial demands. Holy Synod of Greece convenes to discuss its position on the Patriarch Irenaios issue in light of Monday’s meeting at the Phanar. Geotechnical Chamber of Greece holds a conference on «Technology and Education in Environmental Issues: The Role of Geotechnical Engineer,» at 8.30 a.m. at the GSEE premises, 69 Patission. Tel. 2310.278.817. Sunday President Karolos Papoulias visits Hania for events commemorating the WWII Battle of Crete. Athens Stock Exchange holds the fifth Securities and Derivatives Forum to be held at the Divani Caravel Hotel.