Upakarma is an ancient annual Vedic ritual followed by Brahmins in Shravan month or Bhadrapad month (August – September) depending on the Veda they follow or read. Changing of Yagnopaveetha is the main ritual followed on Upaakarma day.
Here are the dates of Upakarma 2016
Sama Veda Upakarma or Sama Upakarma 2016 – 7 August / 4 September.
Krishna Yajurveda Upakarma 2016 – August 16
Rig Veda Upakarma 2016 – August 17
Shukla Yajurvedi Upakarma or Yajur Upakarma 2016 – 18 August (Hayagriva Jayanti) / (Avani Avittam) / Jandhyala Purnima.
Upakarma means the ‘beginning’ in Sanskrit as it is the most auspicious day to start Vedic studies.
Rig Upakarma and Yajur Upakarma are observed in Shravan month whereas Sama Upakarma is observed in Bhadrapad month. Shravan Purnima is also observed as Hayagriva Jayanthi. To honor Lord Hayagriva, the protector of Chatur Vedas, Brahmins observe Upaakarma on Shravani Purnima day.