昨日のパーティー

yesterday's party

→ 昨日
phrase Rare #27,509
yesterday's party の connects 昨日 (yesterday) to パーティー (party), meaning the party that took place yesterday.
JA: 昨日のパーティーで新しい人に何人か会いました。
EN: I met several new people at yesterday's party.

彼女は昨日のパーティー青のドレスを着ていた

She was wearing a blue dress at the party yesterday.

昨日のパーティーの間彼女は時折家に電話していた

She called home from time to time during yesterday’s party.

昨日のパーティー楽しかったよ

Yesterday’s party was fun.

昨日のパーティーなんで来なかったの

Why didn’t you come to the party yesterday?

彼女は昨日のパーティー現れなかった

She didn’t show up at the party yesterday.

昨日のパーティーは楽しかったですか

Did you enjoy the party yesterday?