Brahmotsavam celebrations are on at Sri Madhava Perumal temple, Mylapore till May 20. Highlights include a Hamsa vahanam today (May 13) at 7.30 p.m, Sesha vahanam on May 14 at 7.30 p.m., Nachiyar Thirukolam on May 15 at 7 a.m. and Thiruther on May 17 at 8 a.m. For details contact 24985112.