Maha Kumbh Mela takes place every 144 years. It is held after every 12 full Kumbh Melas. Kumbh Mela is organised on the basis of the movement of Jupiter. Jupiter revolves around each zodiac sign in approximately 12 years and then returns to the same zodiac sign. According to mythology, during the churning of the ocean, there was a fight between gods and demons for 12 days over the pot of nectar. It is believed that during this battle, drops of nectar fell at 12 places.