Zilele Academice Clujene – ZAC (Academic Days of Cluj-Napoca) are scientific manifestations organized by the Romanian Academy, Cluj-Napoca Branch, together with its subordinated institutes.

The ZAC symposiums from ICTP have been organized annually or every two years from 1990 until 2021 (in 2022, ICTP has started the NA-NM-AT international conferences).

The themes of the ZAC symposiums has been given by the fields of research from ICTP: numerical analysis, numerical modeling, approximation theory, mathematical modeling, and related fields.

The ZAC symposiums were attended mainly by mathematicians from Cluj-Napoca, but also from Romania and from abroad.

Below is the list of the ZAC editions of ICTP.