Lord Krishna descends, in His original form, once in a
day of Brahma, which is 4 billion, 320 million years.
Lord Krishna took birth here about 5,000 years ago in
Dwapara-yuga. Krishna appeared at midnight, on the eighth
day of the waning moon, in the month of Bhadra (Aug-Sept),
in the jail house of King Kamsa, in Mathura. The leader
of the demons, Kamsa, had imprisoned Krishna's father,
Vasudeva, and mother, Devaki. Devaki was the cousin (sister)
of Kamsa. They were imprisoned because there was a prophecy
that the eighth son of Devaki would kill Kamsa. Before
Krishna had appeared, Kamsa had already killed the first
six sons of Devaki.
At the time of birth of Lord Krishna, everywhere there
was an atmosphere of peace and prosperity. There were
auspicious stars visible in the sky, and on the surface
in all towns and villages or pasturing grounds and within
the minds of everyone there were signs of good fortune.
The rivers were flowing full of waters, and the lakes
were beautifully decorated with lotus flowers. The forests
were full with beautiful birds and peacocks. All the birds
within the forests began to sing with sweet voices, and
the peacocks began to dance along with their consorts.
The wind blew very pleasantly, carrying the aroma of different
floweres, and the sensation of bodily touch was very pleasing.
At home, the brahmanas, who were accustomed to offer sacrifices
in the fire, found their homes very pleasant for offerings.
Due to disturbances created by the demoniac kings, the
sacrificial fire, altar had been almost stopped in the
houses of brahmanas, but now they could find the opportunity
to start the fire peacefully. Being forbidden to offer
sacrifices, the brahmanas were very distressed in mind,
intelligence and activities, but just at the point of
Krishna's appearance, automatically their minds became
full of joy because they could hear loud vibrations in
the sky of transcendental sounds proclaiming the appearance
of the Supreme Personality of Godhead