päivänviikon

Päivänviikon appears to be a nonstandard or coined form in Finnish. The normative term for “the day of the week” is viikonpäivä. If you encounter päivänviikon, it is likely the result of a stylistic choice, a brand name, or a mistaken combination of päivää (day) and viikon (of the week). In standard Finnish, the concept is referred to with viikonpäivä and its plural viikonpäivät.

The seven days of the week in Finnish are maanantai, tiistai, keskiviikko, torstai, perjantai, lauantai and sunnuntai. These names are common nouns and are written with lowercase letters unless they begin a sentence or appear in a title. When indicating time, the days appear in inflected forms such as maanantaina (on Monday) or tiistaina (on Tuesday). The plural form viikonpäivät refers to several days of the week, for example “erilaiset viikonpäivät”.

In usage, viikonpäivä is used in calendars, schedules, and everyday speech to identify a specific day. Finnish often prefers naming the day rather than giving a date when the relative position in the week is important. For example, one might say “palataan ensi maanantaina” (we’ll reconvene next Monday) or “tiistaina on kokous” (on Tuesday there is a meeting).

Overall, päivänviikon is not part of standard Finnish linguistic practice; for clarity and correctness, quedarse with viikonpäivä and the familiar day names.