History of Maha kumbh
There are some stories behind maha kumbh. These stories related to the samudra manthan. But other than stories in santan dharma the rivers get workships from very earlier.
Before it was named as “Magh mela”.
Calculation of Kumbh
12 days of Devta = 12 year of Human
Every 12 year kumbh mela happens in any one of these four places ( Prayagraj, Nasik, Hariduar, Ujjain )
Jupitar, Sun and Moon decide the Kumbh mela.