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.
Treta Yuga, the second age in a cycle, lasts for 1,296,000 years (3,600 divine years), where its main period lasts for 1,080,000 years (3,000 divine years) and its two twilights each lasts for 108,000 years (300 divine years). The current cycle's
Treta 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==