Having a rest - perfective To rest (/have rested) - imperfective?

'Yesterday we had a good rest' is fine (native speaker).

Вчера у нас был хороший отдых.

"Вчера у нас был хороший отдых" I wouldn't call it incorrect, but it sounds awkward / unnatural to me, we just don't usually speak this way.

There are probably some exceptions (can't think of anything offhand), as always, but normally you won't hear / should avoid saying this.

I also have this exact same question

perfective/imperfective