1.
the night before last
The night of two days ago — the evening preceding last night.
一昨夜は眠れなかった。
I couldn't sleep the night before last.
事件は一昨夜起きた。
The incident happened the night before last.
一昨夜遅くに帰宅したので、まだ疲れが残っている。
I got home late the night before last, so I'm still tired.
A somewhat formal word, common in writing and news. In casual speech, おとといの夜 is more usual.
SIMILAR WORDS:
- 昨夜: last night
- 一昨日: the day before yesterday
- 一昨夜: the night of the day before yesterday