31/03/2020
The Yuga cycle contains 4 yugas (ages) - Satya Yuga, Dwapar, Treta and Kali Yuga.
The age of Kali Yuga = 432,000 years
The age of Dwapar Yuga = 432,000 * 2 = 864,000 years
The age of Treta Yuga = 864,000 * 2 = 1,728,000 years
The age of Satya Yuga = 1,728,000 * 2 = 3,456,000 years
One Mahayuga is the entire one cycle = 6,480,000 years. This duration is equal to one day of Lord Brahma. His night is of equal duration. So the entrie day of Brahma becomes -
64,80,000 * 2 = 12,960,000 years
Lord Brahma lives for 100 years and passes away and the universe ends. A new Brahma is born and creates the universe again.
So the entire duration of life of universe is -
12,960,000 * 365 * 100 = 4,730,400,000 years
Time is Ephemeral.