This is the 906th most frequent Finnish word.
päivinä
"Päivinä" means "on days" in English.
Here, 'päivinä' is used in the context of describing specific types of days in a general sense, employing the adessive plural form of 'päivä'.
Hyvinä päivinä kaikki tuntuu helpolta.
On good days, everything feels easy.
In this sentence, 'päivinä' is employed to describe a condition when an action occurs, utilizing the plural adessive form for emphasis on the nature of the days.
Hän käy lenkillä vain aurinkoisina päivinä.
He goes jogging only on sunny days.
'Päivinä' is used here to underline the characteristics of certain days, using the adessive plural ending combined with an adjective.