Kalpa (aeon) - Hinduism

Hinduism

In Hinduism (cf. Hindu Time Cycles), it is equal to 4.32 billion years, a "day of Brahma" or one thousand mahayugas, measuring the duration of the world (scientists estimate the age of the Earth at 4.54 billion years). Each kalpa is divided into 14 manvantara periods, each lasting 71 yuga cycles (306,720,000 years). Preceding the first and following each manvatara period is a juncture (sandhya) the length of a Satya-yuga (1,728,000) years. Two kalpas constitute a day and night of Brahma. A "month of Brahma" is supposed to contain thirty such days (including nights), or 259.2 billion years. According to the Mahabharata, 12 months of Brahma (=360 days) constitute his year, and 100 such years the life cycle of the universe. Fifty years of Brahma are supposed to have elapsed, and we are now in the shvetavaraha-kalpa of the fifty-first; at the end of a Kalpa the world is annihilated.