전날까지

In a sentence

• 전날까지 준비를 마쳤어요.

  I had finished the preparations by the previous day.

  The word '전날까지' here indicates the time frame up to the day before the mentioned event, setting a context of past completion.

• 전날까지는 비가 와서 면회가 취소되었습니다.

  It rained until the day before, so the visitation was canceled.

  In this sentence, '전날까지' is used to specify a period that lasted up to the previous day which affected the situation described.

• 전날까지 비가 그치지 않아 산행 계획을 변경했습니다.

  The rain didn’t stop until the previous day, so we changed our hiking plans.

  Here, '전날까지' shows the limit of time (up to the day before) during which a condition continued that led to a decision.