Prime Minister Costas Karamanlis addresses the 50th anniversary celebration of the Eugenides Foundation.

Minister of Transport Michalis Liapis is to open a conference at the headquarters of the Civil Aviation Authority (YPA) on the occasion of International Civil Aviation Day.

The 1st Panhellenic University Sports Conference opens at the Ionia Cultural Center in the southern Athenian suburb of Voula. Call 210.772.2137 for details. To tomorrow.

The 2nd General Assembly and Annual Congress of the European Federation of the Associates of Professional Congress Organizers opens at Helexpo in Athens. Visit www.hapco.gr for details. To Saturday.

All tax offices in Attica and the Cyclades are closed due to their annual meetings.

Prime Minister Costas Karamanlis is to inaugurate the 6th Conference of the World Council of Hellenes Abroad (SAE) at the Ioannis Velidis Conference Hall in Thessaloniki. To Sunday.

Deputy Foreign Minister Evripidis Stylianidis and US Ambassador Charles Ries are to speak on “Helping Hands: Greek and American Approaches to Development Aid Policy” at the Yiannos Kranidiotis Auditorium at the Ministry of Foreign Affairs at 10.30 a.m.

A Greek-Turkish conference on “Recent Advances in Chemo-radiation in Oncology” takes place at the Ledra Marriott Hotel in Athens. Call 210.363.4944 for details.

The 6th Panhellenic Conference on Science in Education and Society takes place at the University of Athens. Call 210.368.8031 for details.

The Mediterranean Special Event for Exhibitions, Conferences and Below-the-Line Activities organizes the Exporamashow at Helexpo in Athens. Visit www.exporamashow.com for details. To Monday.

The 5th Pan-Cretan Meeting of Environmental Organizations takes place in Iraklion, Crete. For details, visit www.ecocrete.gr.

An international symposium on cross-cultural evaluation and proposals for sustainable development in education starts at the Kilkis conference center. Info: http://dide.kil.sch.gr.