Guru Purnima 2021: Date, tithi history, significance of Ashada Purnima Guru Purnima 2021: Date, tithi history, significance of Ashada Purnima The full moon day of the Hindu month of Ashada is a day that is very sacred and especially so, as it is a day to worship the Great Indian sage Vyasa. Share Updated: Jul 23, 2021, 07:07 AM IST People will celebrate Guru Purnima on Saturday (July 24). On this day, students pay respect to their gurus and it's celebrated on the birth anniversary of Veda Vyasa. Guru Purnima is also known as Vyasa Purnima or Ashada Purnima as falls in the month of Ashadh.