五十 ごじゅう ねん まつりじゃなかったです
gojūnemmatsurijanakattadesu

Noun
Desu Copula

The polite, past negative form of 五十年祭

1. Wasn't a 50th-anniversary celebration.; Wasn't the 50th anniversary.

Past/Perfective
Negative
Polite
Casual Register