The fourth day of Diwali celebrations is 'Padwa' or 'Varshapratipada'. In the North India, it is called as Govardhan Puja. This pooja is performed with great zeal and enthusiasm and in the states of Punjab, Haryana, Uttar Pradesh and Bihar.
Govardhan Puja Legends
'Govardhan' is a small hillock situated at 'Braj', near Mathura. The legends in 'Vishnu Puraan' have it that the people of Gokul used to worship and offer prayer to Lord Indra for the rains because they believed that it was he who sent rains for their welfare but Lord Krishna told them that it was Mount Govardhan (Govardhan Paevat) and not Lord Indra who caused rains therefore they should worship the former and not the latter. People did the same and it made Lord Indra so furious that the people of Gokul had to face very heavy rains as a result of his anger. Then Lord Krishna came forward to ensure their security and after performing worship and offering prayers to Mount Govardhan lifted it as an umbrella on the little finger of his right hand so that everyone could take shelter under it. After this event Lord Krishna was also known as Giridhari or Govardhandhari.
Govardhan Pooja Celebrations
The fourth day of diwali celebrations is also observed as Anna-Koot, which literally means 'mountain of food'. On this auspicious day the people prepare fifty-six or one hundred and eight different varieties of delicious dishes to offer Lord Krishna as 'Bhog'. In the temples, specifically in Mathura and Nathdwara, the deities are given milk bath, dressed in new shining attires and decorated with ornaments of dazzling diamonds, pearls, rubies and other precious stones and metals. Then they are worshipped, offered prayers and bhajans and also offered delicious sweets, fruits and eatables that are ceremoniously raised in the form of a mountain before the idols.
The fourth day of diwali celebrations or the day following the 'Amavasya' is 'Kartik Shuddh Padwa', which is also the day when the King Bali would come out of the 'Patal Lok', the nether land and rule the 'Bhoo Lok', the world as per the boon given to him by 'Batu Waman', Lord Vishnu. Therefore this day is also known as 'Bali Padyami'. 'Padwa' or 'Varshapratipada' also marks the coronation of King Vikramaditya as 'Vikaram-Samvat' was started from this Padwa day.