S. Giridhar, registrar and chief operating office, Azim Premji University is the chief guest at P. S. Senior Secondary School’s 40th annual day celebration to be held on Aug 23 at Narada Gana Sabha, Alwarpet. Colonel Vembu Shankar, alumnus, 1993 batch is the guest of honour. At T. T. K Road, Alwarpet, 5 p.m.