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The Pagerwesi occur every 210 days on Wednesday Kliwon Sinta (the first Wednesday in Balinese Pawukon calendar). The celebration is based on the ancient scripture, Sundarigama, which stated that Budha Kliwon Shinta Ngaran Pagerwesi payogan Sang Hyang Pramesti Guru kairing ring watek Dewata Nawa Sanga ngawerdhiaken sarwa tumitah sarwatumuwuh ring bhuana kabeh, means Wednesday Kliwon Shinta is known as Pagerwesi, when Sanghyang Pramesti Guru (God as Supreme Teacher) with Dewata Nawa Sanga (Gods that protect nine directions) meditate for the welfare of all being in the world.