This is the 354th most frequent Ukrainian word.
дні
The Ukrainian word "дні" means "days" in English.
In this sentence, "дні" refers to days as units of time, specifically characterizing their length during a season.
Дні стають довшими навесні.
The days grow longer in spring.
Here, "дні" is used metaphorically to signify periods or moments in a lifetime, specifically highlighting memorable ones.
Кращі дні його життя вже позаду.
The best days of his life are already behind him.
"Дні" in this context refers to days characterized by their placement within a specific season, associating them with a particular activity.