I have given below a discussion of the length of the yugas in Linga Purana.
O brahmins, the Krta yuga consists of four thousand years. Four
hundred, three hundred, two hundred and hundred years respectively
constitute the period of transition both at the beginning and end of a
Linga Purana I.4.5-6
 Each Yuga is prefixed and suffixed by a ...
Its not that direct, we need to calculate it! From the Shri-Surya-Siddhanta, Chapter 1 Verse 17
युगस्य दशमो भागश्चतुस्त्रिद्वेकसंगुण: ।
क्रमात् कृतयुगादीनां षष्ठांश: सन्ध्ययो: स्वक:॥ १७॥
The tenth part of the age, multiplied successively by 4, 3, 2 and 1 gives length of golden and other ages in order. The sixth part of it belongs to its Dawn and twilight.
Subhadra and Yogamaya are two separate sisters of Shri Krishna. Of them, Subhadra was the daughter of Vasudeva and Rohini. She was not Yogamaya. On the other hand, Yogamaya, the daughter of Nanda is Shri Krishna’s other sister. She is Devi Ekanamśā or Devi Vindhyavasini. Both sisters have been described in the Harivamsa.
Subhadra has been described ...
Pandavas went to punish Ashwatthama for the crime of killing Pandva children and Dhrishtadyumna but he used the divine weapon brahmashira against them. Then, Arjuna also used brahmashira in defend and later revoked it but Ashwatthama couldn't revoke and redirected it to Parikshit instead. Later Ashwatthama was curshed by Lord Krishna and his gem (was born ...
Vishnu Purana: Book I: Chapter III mentions that one Manwantara is equal to 71 Chaturyuga or 306720000 human years:
a Manwantara, is equal to seventy-one times the number of years contained in the four Yugas, with some additional years: this is the duration of the Manu, the (attendant) divinities, and the rest, which is equal to 852000 divine years, or to ...