Why Fast on Purnima & Amaavasya?

“Amavasya is [new] moon day and Purnima is full moon day in Hindu calendars. Both Amavasya and Purnima are considered equally strong in Hindu beliefs. In the olden days people would always fast on Amavasya. It is said that if one can fast on an Amavasya that is on a Monday then all their wishes will be fulfilled.”

Amavasya Poornima

Please note:  All of the information was obtained from the various cited articles.

“After fasting one can take a dip in the river and later worship Lord Shiva. The famous festival of lights Diwali also falls on an Amavasya day. Many important festivals in India also fall on Purnima.

Purnima  is associated with prosperity and divinity. No auspicious work is ever done on Amavasya. However, any task that is done on Poornima is expected to be successful. The interesting part is that in the olden Hindu society Amavasya was the monthly offs in every month. No one would work on this day as they were considered not auspicious. No journeys were started on the Amavasya day. Even today many elders will advise you not to start a journey on an Amavasya day. The logic could have been that on Amavasya as there is no light it would be difficult to reach the destination. Perhaps if this was the logic then it makes sense to travel now in Amavasya too. Nevertheless, many people still prefer not to travel on Amavasya.

The Mahalaya

On Amavasya many people fast and offer puja to the souls of their forefathers. They also offer water to the departed souls. The Fifteen days before the Navratri there is Amavasya which is called Mahalaya. This is the time which is called Pitri paksha and is considered as a very good time to offer prayers to the departed souls and ensure that they rest in peace. Food is offered to the ancestors. It is said that lord Vishnu himself said that on these days the ancestors come to earth and if they are not offered puja and food they feel offended. There is also a popular story that Karna who was a famous character in Mahabharata after death could not get food. He was known for charity and he gave people a lot of gold but not food. When Lord Yama saw his state he advised Karna to go back to earth and feed the poor. Karna got back to earth and fed the poor during the pitri paksha. This enabled him to get food in his life after death. This is exactly why many people even today feed the poor on these days so that their forefathers get peace in their after lives.

Dates of Amavasya and Purnima

This will help you to decide which days are good and which are not. Accordingly you can ensure that you don’t start any new task on an Amavasya day as it may fail. You can also decide on the Amavasya that you want to fast on. We know you cannot possibly follow all the days but even if few Amavasya and Purnima are done it can definitely help you improve your luck.


The Vedas state that as full moon and no moon may have some influence on the human body this is exactly why on these days people are told to fast and this will ensure that the acidic content in their blood is reduced. Doing puja on a no moon and full moon day can also ensure that the people attain peace of mind and become calm. The vedas stated that the change in the shape of moon leads to the change in the gravitational pull that every man in earth experiences. This is exactly why people tend to behave weird and short tempered don this day. If they stay involved in puja then they may not feel this change. Even modern medical science will tell you that this theory is not exactly false. People who suffer from mental disorder tend to become more excited on Amavasya and Purnima. It is good to find scientific explanation about our traditions it makes us belive in them more.


Maha Mrityunjay Jap is a very powerful havan that is done on Poornima itself to get the best results. The ritual is very powerful and is done by learned gurus alone. Doing this havan can solve a lot of problems and make life better. Doing this havan can please both Lord Shiva and Vishnu. On Purnima after fasting people worship the moon god for his blessings. It is said that this pooja can be very powerful and help the devotees attain their wishes.”

Source: http://www.metaphysics-knowledge.com/miscellaneous/importance-of-amavasya-and-poornima.html/

“Another aspect in Purnima (full moon) the planet is in a certain position in relation to the moon. The vibration and feel of the moon is very different when it is full. And its magnetic pull is also different at the time. It is working upon the surface of the planet which is exposed to the moon. When there is such a natural pull since your spine is vertical there is a tendency for your energies to move upward. That means blood and prana , the fundamental life energies, flow in a different way. Just as tides rise higher on that night because of the moon’s gravitational pull, your blood is also being pulled up and the circulation of blood increases in your brain.

This upsurge of energy enhances your qualities whatever they may be. If you are mentally unbalanced, it will make you even more imbalanced. If you are meditative it makes you more meditative. If you are loving it makes you more loving. If you are fearful it makes you more fearful. The same happens with other qualities in you too, but most may not be sensitive enough to notice it.

For seekers, especially those on the meditative path…poornima (full moon) is giving you a free ride of energy and awareness.”

Source: http://www.dalsabzi.com/books/hindu_customs/fasting_on_purnima.htm


“Fasting is a sort of-Self discipline. It strengthens our faith in God. When we keep fasts for a purpose, we act on the faith that our prayers will be answered. Faith is positive thinking: so the chances are that what you wish for will come to pass.

The purpose of fasting is not simply refraining from eating and drinking but refraining from evil speech thoughts and deeds…and to be in a state of worship even while asleep.

Having said that  Fasting  creates remarkable endurance in a person,a special feeling of empathy and a sense of equality between the rich and the poor.

Fasting occasionally, is a key to good health. This is intended to give a rest to the digestive system in the human body, so that the stomach muscles can easily throw out the toxic contents of the food without strain.”

Source: http://www.dalsabzi.com/books/hindu_customs/fasting_on_purnima.htm

How to fast during Purnima:

“The Purnima Fasting begins at Sunrise and ends after seeing the Moon. Most people only take food after seeing the moon or after evening prayers, however, the rules of Poornima fasting are not that strict. One may take food at one time during the day but WITHOUT SALT. The remaining day, one may eat fruits and nuts and milk, but MUST not eat (cereals or pulses – anaaj) and salt. Satyanarayana or Satya Narayana Puja is an  important Pooja performed on the Purnima day.”

Source: http://humindian.com/spirituality/indian-festivals/purnima-fast-fasting-upvaas-vrat-poornima-vrat-upvas-importance

kalash 2015 kalash
04 January (Sunday) Paush Purnima Vrat
03 February (Tuesday) Magha Purnima Vrat
04 March (Wednesday) Phalguna Purnima Vrat
03 April (Friday) Chaitra Purnima Vrat
03 May (Sunday) Vaishakha Purnima Vrat
01 June (Monday) Jyeshtha Purnima Vrat
01 July (Wednesday) Ashadha Purnima Vrat
30 July (Thursday) Ashadha Purnima Vrat
29 August (Saturday) Shravana Purnima Vrat
27 September (Sunday) Bhadrapada Purnima Vrat
26 October (Monday) Ashwin Purnima Vrat
25 November (Wednesday) Kartik Purnima Vrat
24 December (Thursday) Margashirsha Purnima Vrat
kalash 2015 kalash
20 January (Tuesday) Magha Amavasya
18 February (Wednesday) Phalguna Amavasya
19 March (Thursday) Chaitra Amavasya
18 April (Saturday) Vaishakha Amavasya
17 May (Sunday) Jyeshtha Amavasya
16 June (Tuesday) Ashadha Amavasya
15 July (Wednesday) Ashadha Amavasya
14 August (Friday) Shravana Amavasya
12 September (Saturday) Bhadrapada Amavasya
12 October (Monday) Ashwin Amavasya
11 November (Wednesday)* Kartik Amavasya
10 December (Thursday) Margashirsha Amavasya

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