Guru Poornima is also popularly known as Vyas Purnima after Maharshi Vyasa. Vyasdev is the author of epic Mahabharata. He is also the compiler and editor of Vedas, and 18 Puranas.
The unparalled knowledge of Santana Dharma that were only registered in the memory of great rihsis (sages) and which were passed on orally from Guru to Shishya for generations was for the first time, compiled and written down by Vyasdev. It is believed that Vyasdev completed the compilation of the four Vedas on the Purnima day (fullmoon day) and therefore the day is referred as Vyas Poornima.
The Vedas were written for the first time on ‘Bhoj Patra’ and to complete this job Vyasdev chose a secluded place and even his close disciples were not allowed to visit him. He went into deep mediation and wrote down from memory the great teachings of the Rishis/Sants of yesteryear. Knowledge which was passed down orally for generations was for the first time written down for future generations. When Vyasdev gave darshan to his disciples after completing the Vedas, they referred to the day as Guru Purnima as Maharshi Vyasa was their Guru.
