Purnima Vrat: What the Full Moon Asks of You

Purnima is the fifteenth tithi of the waxing fortnight, the lunar day on which the Moon stands directly opposite the Sun and shows a fully lit face. It comes once a lunar month, twelve or thirteen times a year, and it is the day on which the largest number of Hindu households perform some rite, usually without calling it a vrat at all.

The observance has two halves that are often run together: the fast itself, and the Satyanarayan Puja, which is the reason most families mark the day.

The Moon at Maximum

A tithi is a measure of separation. The Moon gains twelve degrees on the Sun in each lunar day, and Purnima is the fifteenth, the one in which that separation reaches a hundred and eighty degrees. The Moon has moved as far from the Sun as it can, so all of the light it receives is turned toward us.

That geometry is why the day carries the meaning it does. Where the new moon is read as emptiness and completion, the full moon is read as fullness and visibility, and the whole class of rites performed on it are rites of thanksgiving rather than of petition. Nothing is being asked for. Something is being acknowledged.

The Satyanarayan Puja

More households perform the Satyanarayan Puja than any other single ritual in India, and Purnima is its usual day. Vishnu is worshipped in the form of Satyanarayan, the lord of truth, the katha is read aloud in five parts, and the prasad is sheera, a semolina pudding made with equal measures of semolina, ghee, sugar and milk, together with panchamrit, a mixture of milk, curd, ghee, honey and sugar.

The katha is the substance of it. Each of the five stories turns on the same point. Someone vows to perform the puja, receives what they asked for, forgets or postpones the vow, and loses it all again until the vow is kept. Read plainly, it is a story about follow-through rather than about ritual mechanics, and the full moon is the day chosen for it because it is the day of things brought to completion.

The puja is not restricted to Purnima. Families perform it on Sankranti, after a house move, a wedding, a recovery, or any turn of fortune worth marking. Purnima is simply when it comes round without needing an occasion.

How the Vrat Is Kept

The fast is lighter than Ekadashi. Most keep a single meal, taken after the moon has risen and been offered water, and drop grain, salt and anything heavy for the rest of the day. Charity is part of it, and giving white things, rice, milk, sugar or white cloth, is the traditional form, because white belongs to the Moon.

Several Purnimas carry their own weight through the year. Guru Purnima in Ashadha is the day of the teacher, and our Guru Purnima page covers what it asks. Sharad Purnima in Ashwin is the night kheer is left out under the moonlight to absorb it before being eaten. Kartik Purnima is Dev Deepawali, when the ghats of Varanasi are lit end to end. Vaishakh Purnima is Buddha Purnima.

A Full Moon Against a Strained Moon

In this tradition the Moon is the mind. Not the intellect, which belongs to Mercury, but the emotional weather, the sense of being held or unheld, the part of you that reacts before you have decided anything.

So the full moon means different things depending on what the Moon is doing in your own chart. A Moon that is comfortably placed and well supported takes a full moon as what it is, a peak, and many people notice nothing at all. A Moon under strain has a harder time of it, and the tradition watches three specific conditions:

• A Moon with no planet in the houses on either side of it, called Kemadruma, read as a mind with nothing to steady it.
• A Moon sitting with Saturn, Rahu or Ketu, read as a mind that is weighted, unsettled, or pulled somewhere it did not choose.
• A Moon that was thin at birth, meaning a birth in the dark fortnight close to the new moon, when the Moon has little light to give.

Where any of those is present, a monthly rite on the full moon is prescribed as steadying rather than as celebration: the fast, white offerings, the Moon mantra, and water offered to the moon before the single meal. Some people find the days around a full moon restless, and where that is a pattern rather than an occasional thing, the chart usually has something to say about it.

The condition of your own Moon, its sign, its nakshatra, the segment of the sky it occupies, and whether anything sits beside it, all come out of the free kundli. Whether the full moon is a peak or a strain for you is a specific question with a specific answer, and it is not the same answer for everyone.

What the Day Asks of You

Keep it light. One meal, taken after the moon is up, water offered to the moon before you eat, and something white given away. If you are doing the Satyanarayan Puja, have the katha read aloud rather than summarised, because the reading is the rite.

Then use the day for what it is good for. The full moon closes a cycle, so it suits finishing over starting: the conversation you have been postponing, the thing you said you would do and did not, the vow in the katha that the whole story turns on.