The 16th ICQC-2018 will be held at Le Palais de I'Europe in Menton, France on Monday 18 June till Saturday 23 June, 2018.
The web site is open:

The 15th International Congress of Quantum Chemistry was held on June 8-13, 2015 at Tsinghua University, Beijing. The website of ICQC-15 is open at external link. Details, contact Professor Zhigang Shuai.