2023: Kranjska Gora, June 18 - 24, 2023
Plenary Speakers:Csilla Bujtás, Zdeněk Dvořák, Michel Lavrauw, Karen Meagher, Torsten Mütze, Dieter Rautenbach, Gordon Royle, Pablo Spiga, Edwin R. van Dam, David Wood, Anders Yeo
2019: Bled, June 23 - 29, 2019
Plenary Speakers:Noga Alon, Marco Buratti, Gareth Jones, Daniel Král', Daniela Kühn, Gábor Korchmáros, Sergei Lando, János Pach, Cheryl E. Praeger, Zsolt Tuza, Xuding Zhu
2015: Kranjska Gora, June 21 - 27, 2015
Plenary Speakers:Michael Giudici, Michael Henning, Brendan D. McKay, Alexander Mednykh, Joy Morris, Gábor Tardos, Carsten Thomassen, Thomas Tucker, Douglas West
2011: Bled, June 19 - June 25
Plenary Speakers: Jonathan L. Gross, Richard Hammack, Wilfried Imrich, Alexander A. Ivanov, László Lovász, Jaroslav Nešetřil, Egon Schulte, Tamás Szõnyi, Martin Škoviera, Asia Ivić Weiss
2007: Bled, June 24 - June 30
Plenary Speakers: Mike Albertson, Brian Alspach, Dragoš Cvetković, Marston Conder, Michel-Marie Deza, Edward Dobson, David Eppstein, Chris Godsil, Branko Grünbaum, Jan Kratochvíl, Jin Ho Kwak, Moshe Rosenfeld, Sergey Shpectorov, Paul Terwilliger, Mark E. Watkins
2003: Bled, June 22 - June 27
Plenary Speakers: Mike Albertson, Peter Cameron, Victor Chepoi, Mark Ellingham, Branko Grunbaum, Pavol Hell, Ken-ichi Kawarabayashi, Mikhail Muzychuk, Richard Nowakowski, Cheryl Praeger, Brigitte Servatius, Jozef Širan
1999: Bled, June 28 - July 2
Plenary Speakers: Brian Alspach, Dan Archdeacon, Marston Conder, Michel Deza, Henry Glover, Pavol Hell, Joan Hutchinson, Wilfried Imrich, Caiheng Li, Crispin St.J.A. Nash-Williams, Roman Nedela, Tomaz Pisanski, Bruce Reed, Bruce Richter, Gert Sabidussi, Thomas Tucker, Mark Watkins, Arthur T. White, Xuding Zhu
1995: Bled, June 25 - June 30
Plenary Speakers: Cheryl Praeger, Lazslo Pyber, Neil Robertson, Paul Seymour, Robin Thomas, Carsten Thomassen, Herbert Wilf, Ming-Yao Xu
1991: Bled, June 24 - June 29
Plenary speakers: Peter Cameron, Tony Gardiner, Francois Jaeger, Ivan Rival, J. J. Seidel, Carsten Thomassen, T. W. Tucker
1985: Dubrovnik, April 8 - April 19
Plenary speakers: A. Bouchet, D.M. Cvetković, C. D. Godsil, I. Gutman, W. Imrich, B.W. Jackson, T.D. Parsons, M. Picardello, T. Pisanski, T.W. Tucker, W. Woess