Friday & Saturday, June 27 & 28: Obon Festival. The Obon tradition was brought to Hawai`i by Japanese immigrants and evolved into a social and cultural event, as well as a religious custom designed to honor ancestors through an evening of dance, music and merry-making. Wahiawa Hongwanji Mission, 1067 California Ave, Wahiawa, 6:30 to 10 p.m.