Manvantara
A manvantara, in Hindu cosmology, is a cyclic period of time identifying the duration, reign, or age of a Manu, the progenitor of mankind. In each manvantara, seven Rishis, certain deities, an Indra, a Manu, and kings are created and perish. Each manvantara is distinguished by the Manu who rules/reigns over it, of which we are currently in the seventh manvantara of fourteen, which is ruled by Vaivasvata Manu.
Etymology
Manvantara, sometimes spelled manwantara or manuantara, is a compound of manu and antara, creating manu-antara or manvantara, literally meaning "the duration of a Manu", or his lifespan, with synonym meanings of "the interval, reign, period, or age of a Manu".Sandhya or sandhi, sometimes with a compound of kala, have been used to represent "the juncture before or after a manvantara", a period of universal deluge :
- manvantara sandhya
- manvantara sandhi
- sandhya kala when describing a manvantara
- sandhi kala when describing a ''manvantara''
Duration and structure
Each kalpa has 14 manvantaras and 15 manvantara-sandhyas in the following order:
- 1st manvantara-sandhya
- 1st manvantara
- 2nd manvantara-sandhya
- 2nd manvantara
- ...
- 14th manvantara-sandhya
- 14th manvantara
- 15th manvantara-sandhya
Surya Siddhanta, Ch. 1:
Vishnu Purana, Part 1, Ch. 3: