What is a “day of Brahma”?

Since one mahayuga lasts for approximately 4.32 million solar years, the day of Brahma is equivalent to 4.32 billion solar years. The kalpa comprises four ages or yugas, namely Satya Yuga, Treta Yuga, Dwapara Yuga, and Kali Yuga. read more

A day of Brahma is also called a kalpa. Each of Brahma's nights lasts a similar period of time. Life is only manifest on earth during the day of Brahma. With the onset of Brahma's night, the entire universe is devastated and plunged into darkness. When another day of Brahma begins, life again becomes manifest. read more