Ashadha Purnima. The full moon of teachers, and of Vyasa, said to have written the Mahabharata. Guru Purnima (Sanskrit: गुरुपूर्णिमा, romanized: Gurupūrṇimā) is a religious festival dedicated to offering respect to spiritual and academic gurus. It is celebrated as a festival in India, Nepal and Bhutan by Hindus, Sikhs and Buddhists. It is observed on the full moon day (Purnima) in the month of Ashadha (June–July) according to the Hindu calendar. It is also known as Vyasa Purnima, because it marks the birthday of Veda Vyasa, the author of the Mahabharata and compiler of the Vedas. Wiki link Dates computed from the Sun and Moon as New Delhi's panchang reckons them; regional calendars can differ by a day. Text: Wikipedia (CC BY-SA).