前日(ぜんじつ)previous day, day before, eve, prior day, preceding day

試合(しあい)の前日(ぜんじつ)なので緊張(きんちょう)しています。

I am nervous because it's the day before the match. {previous day, day before, eve, prior day, preceding day}

試験(しけん)の前日(ぜんじつ)だから今日(きょう)は早(はや)く寝(ね)ましょう。

Since today is the day before the exam, let's go to bed early. {previous day, day before, eve, prior day, preceding day}

レストランの予約(よやく)は前日(ぜんじつ)までにするべきです。

You should make restaurant reservations by the day before. {previous day, day before, eve, prior day, preceding day}

出発(しゅっぱつ)の前日(ぜんじつ)に荷造(にづく)りをするなんて準備(じゅんび)不足(ぶそく)だと思(おも)います。

I think it's insufficient preparation to pack on the day before departure. {previous day, day before, eve, prior day, preceding day}

父(ちち)：「夕飯(ゆうはん)がいるかいらないかくらいはせめて前日(ぜんじつ)までに知(し)らせなさい。」

Father: "At least let me know by the previous day if you're going to be around for dinner or not." {previous day, day before, eve, prior day, preceding day}