The 65th International Conference on Nuclear Physics «Nucleus 2015. New Horizons in Nuclear Physics, Nuclear Engineering, Femto- and Nanotechnologies» which is devoted to the 60th anniversary of JINR was opened on 29 June 2015 in Peterhof, at the Faculty of Physics of the St. Petersburg State University. The Day of JINR was held on 30 June in the building of the Twelve Collegia on the Vasilevsky island of St. Petersburg.The morning session was opened by Professor V.L. Aksenov, Director of the PNPI of the NRC “Kurchatov Institute”, who was Director of the JINR Laboratory of Neutron Physics from 1988 to 2000. Professor Yu.E. Penionzhkevich presented an overview lecture about JINR. The conference will last until 3 July.