Hindu texts describe four
yugas (world ages) in a
Yuga Cycle, where, starting in order from the first age of
Krita (Satya) Yuga, each ''yuga's
length decreases according to a ratio of 4:3:2:1. Each yuga
is described as having a main period ( yuga'' proper) preceded by its (dawn) and followed by its (dusk), where each
twilight (dawn/dusk) lasts for one-tenth (10%) of its main period. Lengths are given in divine years (years of the gods), each lasting for 360
solar (human) years.
Krita Yuga, the first age in a cycle, lasts for 1,728,000 years (4,800 divine years), where its main period lasts for 1,440,000 years (4,000 divine years) and its two twilights each lasts for 144,000 years (400 divine years). The current cycle's
Krita Yuga has the following dates based on
Kali Yuga, the fourth and present age, starting in 3102BCE:
Manusmriti, Ch. 1:
Surya Siddhanta, Ch. 1: ==Characteristics==