The impersonal sentences in Ukrainian and other Slavic languages describe general situations or conditions, and they don't have a subject, however, English always require a subject, and in such cases it's 'it'. If you don't know what this 'it' refers to, use the neuter form of the past tense: 'it was' = 'було'. E.g.
It was noisy = Було галасно.
It was convenient = Було зручно.
It was sunny = Було сонячно.