Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v1.c6.s2.1
Bhāratīya Jyotiḥśāstra (History of Indian Astronomy), translated by R. V. Vaidya v1.c6.s2.1
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v1.c6.s2.1
The measure (length) of the *Kaliyuga* is 4,32,000 years. Those of *Dvāpara*, *Tretā* and *Kṛta* are respectively twice, thrice and four times of this. These four *yugas* constitute the *Mahāyuga* and its measure is ten times that of the *Kaliyuga* and is equal to 43,20,000 years. One thousand such *Mahāyugas* make one *Kalpa*, which is known as *Brahmā’s* day. The *Kalpa* contains 14 *Manus*. So far, a period equal to 6 *Manus* and 27 *Mahāyugas* has elapsed from the commencement of the *Kalpa* up to the present *i.e.* the 28th *Mahāyuga*; and after passing through *Kṛta*, *Tretā* and *Dvāpara* of the current *Mahāyuga*, we are now passing through the *Kaliyuga*.