Srimad Bhagavatam - Celebrations at Nanda's Vraja
Vasudeva took Krishna to Vraja and placed Him beside Yasoda and, in turn, took her daughter, Yogamaya. Due to the effects of Yogamaya, everyone was put into a deep sleep.
Yasoda's husband Nanda, unaware of any of these happenings, was overjoyed to hear the birth of a son.
Nanda, who was fully aware of vedic rituals, immediately called Brahmanas to conduct “Jatakarma”. (It's a ritual that has to be conducted after the umbilical cord is cut and before breast milk is fed to the baby). Soon after the said period restrictions begin (called Purudu).
The ceremony was done in a hurry. It was followed by tarpana to pitru devatas, devata aradane (worship to Gods) and donations.
Nanda donated 2,00,000 cows to Brahmanas each decorated with gold ornaments. He also donated food articles and clothes in large quantities. News spread quickly about the birth of a son to Nanda and Yasoda.
Gokulam (alias Vraja) was in a festive mood. Each household was cleaned, decorated and displayed art work. Streets were decorated with flowers, colorful clothes and mango leaves.
Cows and calves were cleaned with turmeric paste and were decorated with gold chains. Cowherds too wore colorful dresses and ornaments.
Women too dressed up well and were eager to see the new born baby and Yasoda. The entire village came to see the baby leaving their jobs. They blessed the child and prayed to Brahma for protection of the child.
Some sang bhajans, songs and hymns, and few others played instruments. It turned into a sort of Utsav.
On a question why such a celebration, Sage Sukamuni said Srihari steals the heart of the people. When Srihari Himself has descended, why shouldn't it happen.
Indeed, there was no regular supply of milk, curd, butter or ghee to neighborhood villages. Milk, curd butter was generously donated. Nanda was very happy and donated cows, clothes to all the guests.
Source: Bhagavatha Mahapurana