Questions & Answers about Свято у серпні.
Because у here means in, and after у / в with the meaning of location or time, Ukrainian normally uses the locative case.
- серпень = August (dictionary form)
- у серпні = in August (locative form)
So the ending changes from -ень to -ні:
- серпень
- у серпні
This is very common with months:
- у січні = in January
- у травні = in May
- у серпні = in August
Here у means in.
In this sentence, it marks a time expression:
- у серпні = in August
Ukrainian often uses у and в interchangeably in this meaning. The choice is often made for smoother pronunciation rather than a difference in meaning.