This really sounds like «Когда была зима» when played slowly.
I'm not a native english speaker but i'd say that "back then it was winter" is correct too, isn't it?
Why is it была and not было here? What's the difference?
the past tense changes for gender and number. была is feminine to match зима which (I assume) is feminine.
Yes, зима is feminine.
I answered "It was then winter" which was wrong
I did too. What gives?
different between было и была??