Surya Siddhanta with the Exposition of the Hidden Meaning

Experts in time have explained that the period from the second ManvantaraA vast period of time presided over by a specific Manu, the progenitor of humanity. There are 14 in a Kalpa. until the end consists of transitions between past and future ages. He describes the nature of that transition: "In the flood of water." This means that at the time of the destruction of the world, the entire earth becomes filled with water. || 18 || Now, he describes the specific measurement of a KalpaA "Day of Brahma," equaling 4,320,000,000 solar years. in detail:

Fourteen Manus, along with their twilights, are to be known in a Kalpa.

At the beginning of the Kalpa, a fifteenth twilight is recorded, having the length of a Krita Age. || 19 ||

Those fourteen Manus, beginning with Svayambhuva—each consisting of seventy-one YugasA cycle of four ages: Krita, Treta, Dvapara, and Kali.—are to be understood as being within the duration of a Kalpa along with their respective Sandhisoriginal: "Sandhi" - a transitional period or "twilight" between major time cycles.. This means a Kalpa is formed by fourteen Manus, each joined with its own transition period.

Now, a doubt arises: other texts state the measure of a Kalpa is exactly one thousand Yugas. However, by your calculation, a Manu's duration is 71 Yugas (306,720,000 years), and when added to the Krita Age transition (1,728,000 years), a "Manu-with-transition" equals 308,448,000 years. If you multiply this by fourteen, the Kalpa total would be one Krita Age short of a full thousand Yugas. To address this, he says: "At the beginning of the Kalpa." At the very start of the first Manu's reign, experts in time state there is an initial fifteenth transition period equal to the length of a Krita YugaThe Golden Age, the longest of the four yugas.. Thus, the first Manu begins after this initial Krita-length period; by adding these years, there is no contradiction with the "one thousand Yuga" total. || 19 || Now, he describes the measurement of the Day and Night of Brahma:

Thus, with one thousand Yugas, a Kalpa is said to be a Day of Brahma,

Which brings about the destruction of living beings; his Night is of the same length. || 20 ||

In this manner, through the thousand Yugas established by the previous method, the time of a Kalpa—which consists of the "Brahma-dissolution" where all beings are withdrawn—is called a Day of BrahmaThe creator deity in the Hindu trinity. by those who know time. His Sharvarioriginal: "Sharvari" - night. or Night is of the same duration as his Day.