das Konzert war

the concert was

→ der
phrase Uncommon #22,922
the concert was The rest of the sentence describes the concert or says what happened at it.
GE: Das Konzert war wirklich beeindruckend.
EN: The concert was really impressive.

Das Konzert war gut besucht.

The concert was well attended.

Das Konzert war um zehn zu Ende.

The concert ended at ten.

Das Konzert war ein Erfolg.

The concert was a success.

Das Konzert war nicht sehr gut.

The concert wasn’t very good.

Das Konzert war eine große Enttäuschung.

The concert was a big disappointment.

Das Konzert war toll, aber es war kalt im Saal.

The concert was great, but it was cold in the hall.

Das Konzert war echt genial.

The concert was absolutely fantastic.

Das Konzert war lange geplant.

The concert had been planned for a long time.

— Queen (2014)

Das Konzert war voll geil.

The concert was totally awesome.

Das Konzert war nicht so besonders.

The concert wasn’t anything special.