Guru Purnima (Poornima) is a tradition dedicated to all the spiritual and academic Gurus, who are evolved or enlightened humans, ready to share their wisdom, based on Karma Yoga. It is celebrated as a festival in India, Nepal and Bhutan by Hindus, Jains and Buddhists. This festival is traditionally observed to honour one's chosen spiritual teachers or leaders. It is observed on the Full Moon day (Purnima) in the Hindu month of Ashadha (June–July) as it is known in the Hindu Calendar. The festival was revived by Mahatma Gandhi to pay tribute to his spiritual guru, Shrimad Rajchandra. It is also known as Vyasa Purnima for it marks the birthday of Veda Vyasa, the sage who authored the Mahabharata and compiled the Vedas.