Few days before Nyepi / Silent Day, you will see religious parade goes to the beach, lake or river complete with a Hindu’s symbol, such as “pretima, umbul-umbul, etc” followed by gamelan beleganjur (a set of Balinese gamelan).
The ceremony usually done three days before Nyepi day. But also regarding to the result of gathering (paruman) between Pemangku (ceremonial leader) and Bendesa Adat (village functionary ) or regarding to custom village rules (awig-awig).
Melasti also known as Mekiyis that aims to re cleanse Pretima (symbol the place of God) and other related tools used in Hindus ceremonies to keep it sacred and holy. Hindus choosing Beach, Lake or Spring to do the ceremony.
If we look at Balinese balance concept “Tri Hita Karana” (the relationship between human to God, human to human, and human to their environs) this ceremony is related to human and God relationship.
At Nyepi Day, Balinese will stop their activity, stop exploring natural resources, stop making pollution, let the environs back to a normal state.
One day after is called Ngembak Geni. At this day, Balinese visit their kin, family, friends, to keep their relationship.
The occasions of Melasti, Nyepi and Ngembak Geni is implementation of Balinese concept “Tri Hita Karana”.