Lohlunat

From Memory Alpha, the free Star Trek reference

The Lohlunat, also known as "The Festival of the Moon" is a very popular Risian celebration. It was held at Suraya Bay on Risa.

A Risian man told Ensign Hoshi Sato about this event and invited her to join this festival during her shore leave on Risa in 2152. (ENT: "Two Days and Two Nights")