viikkoa

Viikkoa is the partitive singular form of the Finnish noun viikko, meaning a seven-day period. It is used in grammatical constructions that require the partitive case, typically after numerals and other quantifiers when the duration is not counted as a definite object.

In practice, you will see forms like kolme viikkoa, viisi viikkoa or pari viikkoa to mean three weeks, five weeks, or a couple of weeks, respectively. In contrast, the nominative plural viikot or the partitive plural viikkoja are used when referring to multiple weeks in general or as the object of a verb in the plural.

Besides its grammatical use, viikkoa appears in time expressions such as viikkoa myöhemmin (one week later) and viikkoa ennen (one week before). In everyday speech, the duration is often indicated with other forms depending on the sentence’s case requirements.

In Finnish, the concept of a week is typically aligned with the calendar, and ISO week dates place the week starting on Monday and ending on Sunday. The common adverbs for periodic timing include viikottain or viikoittain, meaning weekly or on a weekly basis.