Time of Yugas

According to Bhagvat Puran time frame of Cosmology of Universe and Yug’s is as follows:-

Life of Brahma-----100 years.

Each of Brahma day-----4,320,000,000 years

Each Brahma day has---1000 cycles and each cycle has 71 divisions.

Each division has 4 Yugas and each Yuga has 14 MANVANTRAS. Present Manu is Vaivasvat. We are in 57^th year of Brahma. Each Yug has four sub divisions which are as follows:-

1. Satya Yug duration-------4800x360=1,720,000 years.

2. Treta Yug duration-------3600x360=1,296,000 years.

3. Dwarpar Yug duration---2400x360=864,000 years.

4. Kali Yug duration---------1200x360=432,000 years

We are presently in Kali yug. Jains, Greeks Zoroastrians believed in cycle of 12000 years only. Even in laws of Manu and Mahabharata 12000 year cycle is mentioned. Yukteswar in his book “Holy Science”, 1894 maintains cycle is of 12000 years only. He states in his book 12000 years in ascending and 12000 years in descending phase of cycle making a complete yug of 24000 years which is very close to period Sun takes to  cover all Zodiac signs backwards[25765 years]. He maintains multiplying yuga period by 360[1 Deva=360 earth year] is not needed. He further states this was done to inflate time zone. By this reckoning we are in ascending phase of Kali yug which will end on 2025AD, Then there will be a transition period of 300 years, after which a new yug will start[Ascending phase of Dwarpara yug].

Saptrishi calendar which is of 2700 year [100 years/ Nakhatra] duration starts afresh with new yuga.

Presently Saptrishi calendar is 5088[3076BC] which is very close to kali yug date of3676BC, date of Lord Krishna’s ascent from earth. Saptrishi calendar was used by Hindus in Maurya and Gupta period.

There is intense debate amongst scholars regarding time period of 4 yuga’s as mentioned in Bhagvat. Bhagvat Puran time frame of yuga’s could at cosmic level, at lower level[ Earth] it could be just 24000 year complete cycle as mentioned by Yuktaswar and many others. Even Aryabatha agrees with 3000 year/cycle, a total of 12000 years.