一いっ昨さく昨さく日じつ

noun, adverb

two days before yesterday; three days ago

Refers to the day three days before today. The reading いっさくさくじつ is the most standard; さきおとつい and さきおととい are colloquial or dialectal variants. Used both as a noun and adverbially.

• 一いっ昨さく昨さく日じつは大おお雨あめだった。

  Three days ago, there was heavy rain.

• 一いっ昨さく昨さく日じつの新しん聞ぶんをまだ取とってある。

  I still have the newspaper from three days ago.