Upakarma is the day the sacred thread worn by Brahmins known as ‘Yagnopavitam’ is changed. This is an important ceremony in South India. Upakarma date in 2011 is on August 13. You can get the Upakarma mantras for 2011 in Tamil in these sites.
Link – Yajur Upakarma Mantras
Link – Rig Upakarma Mantra
