According to puranas time is different in different world. That is time runs different for humans, devas, and gods.
According to Purana :
One day of devas = 1 years of human beings.
One year of devas = 360 years of human beings .
There are 4 yugas present. They are satyayuga ,Tretayuga, Dwaparayuga, and Kaliyuga. These four yugas combined known as one Mahayuga.
Total time required to complete this 4 yugas or one Mahayuga is: 12000 years of devas.
That is one Mahayuga = 12000×360=4320000 human years.
One day (Day time only ) of Lord Brahma is 1000 Mahayuga = 1000×4320000 = 4320000000 human years .
One night of Lord Brahma is 1000 Mahayuga = 1000×432000 = 4320000000 human years.
12 Hours of Lord brahma = 4320000000 human years
1 Hours of Lord brahma = 4320000000 ÷ 12 =360000000 human years.
1 Minute of Lord brahma = 360000000 ÷ 60 = 6000000 human years.
1 Second of Lord brahma = 6000000 ÷ 60 = 100000 human years .
ONE SECOND OF LORD BRAHMA = ONE LAKH YEARS OF HUMAN
(Article contributed by Ajith Kumar)