Festival of Lyss
From Guild Wars Wiki
The Festival of Lyss is a celebration held in Vabbi once every year to honor their patron Goddess, Lyssa. It is usually held in the Garden of Seborhin, and many of the rich and noble in Vabbi attend this occasion, including the three Merchant Princes of Vabbi.
Among the celebration events are dancing, drinking, a re-enactment of the Battle of Jahai, more drinking, and various other events.
In the Tihark Orchard mission, the player, thanks to an invitation given to him/her by Kehanni, is able to attend this festival, where they participate in various events and attempt to get the Princes to join them in the fight against Varesh Ossa.

