1h - Scientists: I. M. Frank, G. N. Flerov, V. P. Dzhelepov, M. G. Meshcheryakov, A. A. Logunov and others congratulate Academician N. N. Bogolyubov on his 70th birthday. N. N. Bogolyubov at home with his wife and sons. 2 hours - Opening of an international seminar on mathematics and theoretical physics at the Joint Institute for Nuclear Research: A. A. Logunov reads congratulations on his 70th birthday to Academician N. N. Bogolyubov. V. A. Ambartsumyan is speaking. NN Bogolyubov, AA Logunov, VB Dzhelenov talks with foreign scientists. Exhibition of the printed works of N. N. Bogolyubov.