やなみょうごにちでわありませんでした
やな明後日ではありませんでした
yana myō gonichidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of やなあさって

1. It was not the day after tomorrow.; It wasn't the day after tomorrow.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana