Päivä

Päivää is the partitive singular form of the Finnish noun päivä, meaning "day." In Finnish, the partitive case marks an indefinite quantity or duration, and päevää appears in many time-related expressions. With numerals it denotes a span of days: three days is kolme päivää, five days is viisi päivää. The same form also occurs in phrases indicating a time that has elapsed or continues, such as kaksi päivää sitten (“two days ago”).

The word also features in common expressions and greetings. A well-known example is Hyvää päivää, literally “good day,” used as a daytime greeting. The root päi​vä forms numerous compounds, such as päiväkirja (diary) and päiväntasaaja (the equator), where the sense of “day” persists even as the word participates in longer constructions.

Grammatically, tägä päi​vä shows how Finnish nouns inflect for case and number. Päivää is the standard partitive singular form used in time expressions and in many idiomatic phrases, while other cases yield forms like päivän (genitive) or päivä (nominative) depending on sentence function. The word’s core meaning—day—remains central across contexts, from everyday references to temporal phrases and fixed expressions.

Etymology: Päivä is a native Finnic noun with a long attested history in Finnic languages; its inflected forms include päivää (partitive singular) and päivän (genitive) among others.