1.
two days before (a specified event or date)
The day that is two days before a referenced event or date. Unlike 一昨日 (the day before yesterday, relative to today), 前々日 is used relative to any specified date.
試験の前々日に風邪を引いた。
I caught a cold two days before the exam.
予約は前々日までにお願いします。
Please make your reservation by two days in advance.
結婚式の前々日に最終打ち合わせがある。
There is a final meeting two days before the wedding.
前々日 means two days before a specified event or date — always relative to that event, not to the present.
ETYMOLOGY:
Compound of 前々 (two before) + 日 (day).
RELATED TIME WORDS:
- 前日: the day before (an event)
- 前々日: two days before (an event)
- 翌日: the day after (an event)
- 翌々日: two days after (an event)
CONTRAST WITH 一昨日:
一昨日 means 'the day before yesterday' relative to today. 前々日 is always relative to a specified date or event and is more formal, commonly appearing in written notices and schedules.