날이었다

was a day

→ 날
phrase Rare #23,395
was a day The past-tense form of 날이다, used to say that something was a particular kind of day.
KO: 어제는 정말 바쁜 날이었다.
EN: Yesterday was a really busy day.

기묘한 날 이었다.

It was a strange day.

어제는 좋은 날 이었다.

Yesterday was a good day.

할 일이 많은 날 이었다

It was a day when I had a lot to do.

— 좋은 친구들 (1990)