päiväykseen
Päiväykseen is a Finnish grammatical form, specifically the illative case of the noun päiväys, which means date or dating on a document. The illative marks movement toward or into a destination, sopäiväykseen is used to indicate entering or directing something into a date field or date-related context. In practice, päiväykseen appears mainly in technical, legal, or linguistic texts rather than in everyday speech.
In Finnish, the illative suffix for this noun yields the form päiväykseen, distinguishing it from other cases
Usage tends to be formal and specialized. In ordinary conversation, speakers usually opt for more common constructions,
See also: päiväys, illatiivi, päivitys, finnish grammar terms and usage.