Lecture on “Climatic Change and its Effects” by Professor Dimitris Lalas, of Athens University’s physics faculty, at the Hellenic Society for the Protection of Nature (20 Nikis, Syntagma Square), at 6.45 p.m. Admission is free. For more information, visit www.eepf.gr.

“SOS Children’s Villages: Another Approach to Protecting Children in Greece” is the subject of a debate led by Stergios Sifnios, director of Social Research and Labor at the SOS Children’s Villages, at the Ianos bookshop (24 Stadiou, Athens), at 12.30 p.m.

The Corfu Astronomy Society is holding a lecture by Spyros Georgaras on “The Charm of the Fourth Dimension” in the foyer of the Corfu Municipal Theater at 9 p.m. For further information, call 26610.32450.

Press conference at the Embassy of the Slovak Republic (4 Georgiou Seferi, Palaio Psychico, Athens) on the occasion of Slovakia’s entry into the eurozone, at 4 p.m. in the presence of Plenipotentiary of the Slovak Republic Igor Barat and Bank of Greece Deputy Governor Eleni Dendrinou-Louri. The briefing will be in English with simultaneous translation into Greek.

Winter sales for retail stores begin across Greece and will last until February 28.

The Athens-based Institute of Energy of South-East Europe (IENE) is holding a one-day conference in the Albanian capital of Tirana on Greek-Albanian cooperation in the energy sector. Speakers will include the president of the Public Power Corporation, Takis Athanassopoulos, the president of IENE, Constantinos Maniatopoulos, and the Albanian deputy minister for economy, trade and energy, Neritan Alibali. For further information, visit www.iene.gr.

The 17th “New Life” exhibition for those planning to wed starts at the MEC exhibition center (301 Lavriou) in Paiania. The event runs until Monday. For more information, visit www.newlife-expo.gr.

“Kipotechnica 2009,” the exhibition for gardening and green spaces, opens at the Helexpo Palace (39 Kifissias, Maroussi). Until Monday. To find out more, visit www.kipotechnica.com.

Lecture by Professor Eytan Gilboa of the University of Southern California on “Public Diplomacy in the Information Age“ within the context of the event “International Relations and Public Diplomacy” at the General Secretariat for Information (11 Frangoudi and A. Pantou, next to Pantion University). For details, see www.icpforum.gr or www.publicdiplomacy.gr.

The NGO Memory of Pontian Women is holding a lecture by Michalis Charalambidis on the role of Black Sea women in history, at the Euxeinos Club of Thessaloniki (13 Nikis, Aristotelous Square), at 7 p.m.