Guru Purnima 2027: Ashadha Full Moon, Vyasa Puja and Honouring the Teacher

Why the Ashadha full moon belongs to the guru

A traditional explanation reads the syllable gu as darkness and ru as that which removes it, so the guru is the one who dispels ignorance. The day honours that whole chain of teachers, from a spiritual preceptor to the person who first taught you to read or to hold a tanpura. Tradition holds that Veda Vyasa was born on this full moon. Vyasa is credited with arranging the Veda into four, composing the Mahabharata and compiling the Puranas, and because so much of what later teachers taught passes through him, he is honoured first, which is why the day is also known as Vyasa Purnima.

Buddhists keep the same full moon as Asalha, or Esala, Puja. It recalls the Buddha’s first sermon at the Deer Park in Sarnath, delivered to his five former companions, the moment remembered as the turning of the wheel of the Dhamma. In Sri Lanka, Thailand and other Theravada countries it is one of the principal full moons of the year.

The day also opens a season. For sannyasis, the renunciant monks, the Chaturmasya vrata begins on this full moon: they stop wandering and stay in one place through the rains, teaching those who come to them. The mathas of the Shankara tradition mark the start with Vyasa Puja, worshipping Vyasa together with the line of teachers that follows him.

How the Guru Purnima date is set

Guru Purnima is the Purnima, the fifteenth and last tithi of the bright fortnight of Ashadha, when the Moon is between 168° and 180° ahead of the Sun. Since the full moon closes the Shukla paksha, purnimanta and amanta calendars agree on the name Ashadha Purnima, and the festival usually falls in July, occasionally in the last days of June.

Most calendars fix it on the day on which Purnima prevails at sunrise, following the udaya (sunrise) principle that governs many observances. A tithi does not keep to the civil day, however. When Purnima begins after one sunrise and ends shortly after the next, almanacs apply classical rules about how long the tithi must last into the day, and those who weigh the rules differently can end up a day apart. If you have been wondering “Guru Purnima kab hai” after seeing two dates, this is usually the reason. The date on this page follows the sunrise rule for New Delhi, and the Purnima start and end times are given so that you can compare them with your own panchang.

Vyasa puja, paduka puja and guru dakshina

Observances begin with a bath and fresh clothes. A clean seat is prepared with a picture of Vyasa, of one’s own guru, or the guru’s padukas (sandals), which stand for the teacher’s presence. After a sankalp, the worshipper offers water to wash the feet or padukas, then sandal paste, akshat (unbroken rice), flowers, incense, a lamp and fruit or sweets, and closes with aarti. Many then read from Vyasa’s own works: the Vishnu Sahasranama and the Bhagavad Gita both come from the Mahabharata.

Disciples who can travel visit their teacher to bow, sit in satsang (a gathering for spiritual talk) and offer guru dakshina, a gift given in gratitude. In music and dance, where knowledge still passes from guru to shishya in a living parampara (lineage), students gather to perform before their teachers and seek their blessings. Some homes keep a fast until evening and break it after the puja. Those without a personal guru commonly honour Vyasa, their parents or a scripture that guides them.

Customs to keep and things to avoid

The spirit of the day is gratitude, so the customs are simple. People call or visit former teachers, touch the feet of elders, give books, fees or meals to students and scholars, and set aside time for study or recitation. Many ashrams and sampradayas (spiritual lineages) choose the day for diksha (initiation), and some people begin a new course of learning, such as an instrument or a text, on this full moon.

Traditionally, speaking ill of a teacher or treating learning with arrogance is considered especially out of place on Guru Purnima. In many homes the food is sattvik, without meat or alcohol, and those who fast may keep to fruit and milk; tradition makes room for a lighter fast for the elderly, the unwell and expectant mothers. In years when a lunar eclipse falls on the night, families who keep the sutak (a period of ritual restraint before an eclipse) complete the guru puja before it begins.

Guru Purnima across India and its neighbours

Monasteries, ashrams and mathas hold the largest gatherings, with discourses, Vyasa Puja and community meals. In the classical arts, Hindustani and Carnatic musicians as well as Kathak, Odissi and Bharatanatyam schools hold recitals in which pupils perform as an offering to their gurus.

In Nepal the day is widely marked as a teachers’ day in schools, with students bringing flowers and small gifts. Across Buddhist communities, from Sarnath to Sri Lanka, monasteries hold readings of the first sermon, and in Theravada practice the monks’ rains retreat, the Vassa, begins on the day after the full moon. Among Indian families abroad, temples and cultural associations arrange satsang and children’s recitals in honour of teachers.

The astrology of the Ashadha full moon

At every Purnima the Moon stands opposite the Sun. The month takes its name from the nakshatras Purvashadha and Uttarashadha, and at the Ashadha full moon the Moon is usually in or near them, in sidereal Sagittarius (Dhanu) or Capricorn (Makara), while the Sun is in Gemini (Mithuna) or Cancer (Karka). Sagittarius is ruled by Jupiter, so the full moon of the teacher often lights up the sign of the planet that Vedic astrology itself calls Guru.

In Jyotish, Jupiter signifies teachers, wisdom, scripture and dharma, the very things the day sets out to honour. The tithi’s classical deity is Chandra, the Moon (Muhurta Chintamani), and Purnima belongs to the Purna, or “full”, group of tithis along with the fifth and the tenth.

A lunar eclipse can occur only at a full moon lying close to Rahu or Ketu, the lunar nodes, and in some years that has happened on Guru Purnima. Panchangs then publish the eclipse and sutak timings separately from the tithi.