前ぜん夜や祭さい

noun

eve celebration; pre-event festival; event held the night before

Refers to a celebration, program, or related event held on the night before a main festival, tournament, ceremony, or similar occasion. It can also refer more broadly to the eve of a festival or holiday.

• 学がく園えん祭さいの前ぜん夜や祭さいでバンドが演えん奏そうした。

  A band performed at the school festival's eve celebration.

• 大たい会かいの前ぜん夜や祭さいには選せん手しゅ全ぜん員いんが参さん加かした。

  All the athletes attended the event held on the night before the tournament.