Avani Avittam

Upākarma is conducted once a year during the shravana or Dhaniṣṭhā nakṣatra of the Hindu calendrical month Śrāvana, when Brahmins ritually change their upanayana thread accompanied by relevant śrauta rituals, making śrāddha offerings to the rishis, whom Hindus believe composed the Vedic hymns. The day, also called Śrāvana Pūrnima 'Full Moon of Śrāvana' in other parts of India, usually occurs the day after the Śravana nákṣatra, which also marks the Onam festival of Kerala.On the following day, usually coinciding with the Raksha Bandhan festival in Northern and Central India, the Gayatri Mantra is recited 1008 times.Brahmins belonging to the Samaveda do not perform upakarma rituals or change their thread on this day but rather on Bhādrapada tritiya, the third day of the month Bhādrapada with Hastaa nakshatra. Shukla Yajurvedic Brahmins of North India and Odisha do upakarma the previous day if the full moon spans two days