Vaikhanasa Jayanthi is observed on Purnima in Shravan Month. Sage Vaikhanasa (Vikhanasa) is a human form of Sri Maha Vishnu aroused from his mind and arrived at Naimisharanyam on Shravan Purnima. In 2011, Vaikhanasa Jayanthi date is August 13. As per the instructions of Lord Vishnu, Vaikhanasa preached Vaikhanasa Bhagavath Shastras to his disciples Bhrugu, Mareechi, Atri & Kashyapa.
Sage Vaikhanasa is also known as Sage of the Sages. Sri Vaikhanasa Aagamas, a compilation of several lakhs of slokas, are the physical forms of his lectures which he taught to his disciples.
Vaikhanasa Jayanthi is observed with utmost pomp at Tirumala Tirupati in Vaikhanasa Mandapal & Vaikhanasa Ashramam.