A short talk on “About Raman” of Sir C.V. Raman’s life was delivered by Prof. R. K. Vatsa, Director UM-DAE CEBS followed by National Science Day Lectureon "The Mathematics of Chaos: From Butterflies to Quantum Kinetics" was delivered by Prof. Jens Marklof FRS, University of Bristol, United Kingdom on Tuesday, February 28, 2023.