Anant Chaturdashi of Bhadrapad shukla paksha has two main significances. The first is that it is the day of the immersion of Ganapati (also called Ganapati Visarjan). Thus Lord Ganesha is given farewell, only to be welcomed the next year with equal excitement.
The second significance is that this Pooja is basically that of Shri Vishnu or Shri Krishna Pooja. On this day people recite and listen to the stories and legends of God Vishnu who is Anant, the infinite and recite hymns from the Vedas. This is sometimes also called Ananta Vrat. It is an expanded form of the Satyanarayana Pooja. Anant Chaturdashi is the most noteworthy day to worship Lord Vishnu in Anant form. On this day devotees of Lord Vishnu observe a day long fast and tie sacred thread during Pooja.
Anant Chaturdashi pooja falls on the 14th day of Bhadrapad shukla paksha (first fortnight) of the Hindu calendar year, will be observed on Thursday, 15th September 2016.
On this auspicious day Lord Vishnu sleeping on the bed Anant (the serpent shesh), in the milky ocean is worshiped and meditated upon. People also observe a vow in honor of Vishnu, which if kept for 14 years is supposed to bring wealth. It is believed that Lord Vishnu appeared on this day as Anantapadmanabha – Lord Vishnu’s Ananta Shayana form – reclining on Snake Ananta. The Vratam is also known as Anant chaturdashi Vrata and Anandapadmanabha Vrata.
The observance of Ananta Vrata is believed to secure freedom from all sorrows. The word ‘Ananta’ means endless and devotees believe that Lord Narayana will remove all the difficulties in one’s life, if the Ananta Vrata is observed with utmost devotion. The 14 knotted threads in this Vrata are known as Thread of Ananata (Anantacha Dora) which symbolizes God.
Most women fast on this day for the wellbeing of their family. Some men keep a vow to observe the Anant chaturdashi Vrat or fast for 14 years in a row in order to get the blessings of Vishnu and regain lost wealth.