In Hinduism, Kalki is the tenth avatar of the god Vishnu in the current Mahayuga, foretold to appear at the end of Kali Yuga, the current epoch. The Purana scriptures foretell that Kalki will be atop a white horse with a drawn blazing sword. He is the harbinger of the end time in Hindu eschatology, after which he will usher in Satya Yuga.
In Tibetan Buddhism Kalachakra tradition, 25 rulers of the Shambhala Kingdom held the title of Kalki, Kulika or Kalki-king. During Vaishakha, the first fortnight in Shukla Paksha is dedicated to fifteen deities, with each day for a different god. In this tradition, the twelfth day is Vaishakha Dwadashi and is dedicated to Madhava, another name for Kalki.