Explanation:

Ujjain Simhastha is a Hindu religious mela held every 12 years in the Ujjain city of Madhya Pradesh, India. The name is also transliterated as Sinhastha or Singhastha. In Hindi, the fair is also called Simhasth or Sinhasth (due to schwa deletion). The name derives from the fact that it is held when the Jupiter is in Leo (Simha in Hindu astrology).

It is one of the four fairs traditionally recognized as Kumbha Melas, and is also known as Ujjain Kumbh Mela. According to Hindu mythology, Vishnu dropped drops of amrita (the drink of immortality) at four places, while transporting it in a kumbha (pot). These four places, including Ujjain, are identified as the present-day sites of the Kumbh Mela."Kumbh" in its literal English translation means "Pot", which emerged from "Samudra Manthan"(Churning of the Ocean) between Gods and Demons. The term ‘Mela‘ signifies’Fair‘.