Shri Satyanarayan Puja is performed to seek blessing of God Narayan which is one of the forms of Lord Vishnu. The Lord in this form is considered an embodiment of truth. Although there is no fixed day to perform Satyanarayan Puja but doing it during Purnima or Pournami is considered highly auspicious.
Devotees should observe the fast on Puja day. The Puja can be done in the morning as well as in the evening. However performing Satyanarayan Puja in the evening is considered more appropriate as devotees can break the fast with Prasadam in the evening.
DrikPanchang.com lists Shree Satyanarayan Puja dates for evening time. Hence listed Satyanarayan Puja day might fall on Chaturdashi i.e. one day before Purnima. Devotees who prefer to do Puja in the morning should consult Drik Panchang to make sure that Puja is done within Purnima Tithi. On Purnima day, Tithi might get over during morning time and because of it Purnima Tithi is not always suitable for morning Puja.
Notes: All timings are represented in 24+ hour notation in local time of New Delhi, India with DST adjustment (if applicable).
Hours past midnight are higher than 24:00 and fall on next day. In Panchang day starts and ends with sunrise.
Puja rituals consist of worshipping Lord Satyanarayan which is an extremely benevolent form of Lord Vishnu. Panchamritam (a mixture of milk, honey, ghee/butter, yogurt and sugar) is used to clean the deity, usually Saligram, which is divine stone of Maha Vishnu. Panjiri, which is sweet roasted flour of wheat, banana and other fruits are used as Prasad. Tulasi leaves are added into Prasad to make it sacred.
Another requirement of the Puja is that the story of the Puja, also known as Katha, is listened by those who are participating as well as by those who are observing the fast. The Satyanarayan Katha involves the origin of the Puja, the benefits of the Puja and the potential mishaps that might occur if one forgets to perform the Puja.
The Puja concludes with an Aarti, which consists of revolving a small fire ignited with Kapoor in the vicinity of an image or deity of the Lord. After Aarti participants and Vrat observers are required to consume the Panchamritam and the Prasad. Vrat observers can consume Prasdam after breaking the fast with Panchamritam.