There are 4 yugas and 1 yuga cycle is 43,200,000 years
- Satya Yuga equals 1,728,000 Human years
- Treta Yuga equals 1,296,000 Human years
- Dvapara Yuga equals 864,000 Human years
- Kali Yuga equals 432,000 Human years
1 yuga cycle is called as a Mahayuga.
1000 such Mahayuga is called a day/night of Brahma or Kalpa. So 1 day of Brahma is 2000 Mahayuga.
Each 1000 Mahayuga is divided between 14 Manus. 1 Manu rules 71.42 Mahayuga. Therefore 1 Manvantara is 71(approx) Mahayuga
Therefore 1year for brahma is 360 Brahma Years i.e 360*2000=720000 Mahayuga.
The lifespan of Brahma is hundred years i.e 72000000 Mahayugas.
After these 100 Brahma years, the current Brahma dies and a new Brahma is created by Vishnu.
The Mahasankalpam sums up everything.
Shube shobane muhurte, adya Brahmana, dvitiya parardhe, Shri Shweta Varaha kalpe, Vaivasvata manvantare, ashtavim shatime, kaliyuge pratama charane, kaliyuge pratama pade, Bharata varshe, Bharata kande, jambud dvipe
meaning:-
In the second half of the life of Adhyabrahmanaha , during his day in the Visvaswan Manvantare, in the 28th Mahayuga ,in the initial stages of Kali,in the first quarter of Kali, in Extended south asia, in the Indian subcontinent, and in the peninsular region under Shiva I reside.
The name of The current Brahma is AadhyaBrahmanaha. Now the age of Brahma is divided into two halves. First first 50 is called Prathme Parardhe and Second fifty is called Dvithiya Parardhe. In sanskrit Para means fifty. We are in Dvithiya Paradhe, second half of Brahma’s life. As now it is day for Brahma, it is Shwethavaraha Kalpe.
The current ruling Manu is the 7th Manu aka Lord Surya. The other name for Surya is Viwaswaan.
Hence we are in VIWASWATHA MANVANTHARA. In the 71 Mahayugas of Vaiwaswatha Manvanthara, we are in the 28th Mahayuga. Out of the four Yugas in a Mahayuga we are in Kali.
The time span of Kaliyuga is 4,32,000. Dividing this into four parts , one part is equal to 1,08,000 years. A quarter in Sanskrit is called Pade. Prathame Pade means in the first quarter.