平均 へいきん太陽 たいよう にちじゃなかったです
e ikintai yōni chijanakattadesu

Noun
Desu Copula

The polite, past negative form of 平均太陽日

1. Wasn't the mean solar day.; Wasn't a mean solar day.

Past/Perfective
Negative
Polite
Casual Register