ennichi

noun

1. A day to have a special connection with a particular Japanese deity.“With the spread of Kanzeon worship among the common people, ennichi (days special to Kannon) were established. Although ennichi are not particular to Kannon, and are established for other hotokes and deities, those for Kannon were the earliest to be established and became the most popular.”
2. A festival or fair held on one of these days.“Visiting ennichi, or temple or shrine festival, has ceased to be so interesting and attractive as it was in former days when there was little else in the way of amusement than festivals of temple and shrine.”