We would like to invite you to participate in this year's Zimányi School Winter Workshop that aims to summarize the developments of 2023 in high energy heavy ion physics, with particular attention to the new data emerging from the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC), SPS and J-PARC. We will discuss results from other high energy nuclear and particle physics facilities of the world, most importantly lower energy colliders, exploring the nuclear phase diagram (with special attention to FAIR and NICA). Another important point of the School is to discuss important new results in hydrodynamics, flow and femtoscopy. One of the main aims of the School is to encourage interaction between the theoretical and experimental community.