Tammikuun

Tammikuun is the genitive form of the Finnish month tammikuu, or January. It is used in phrases that denote January as a time frame or as a modifier to another noun, rather than as a standalone month in isolation.

In Finnish, months decline like other masculine nouns, and tammikuun is the genitive singular form. It appears in contexts such as indicating when something happens within January or linking January to another noun. Examples include: tammikuun ensimmäinen päivä (the first day of January), tammikuun lopussa (at the end of January), tammikuun aikana (during January), and tammikuun alku (the beginning of January).

When expressing a calendar date, Finnish commonly uses the partitive form with numerals: 1. tammikuuta (the 1st of January). The genitive tammikuun is thus used when January is the referent of a noun phrase describing a time period, rather than stating a specific date.

Tammikuun may also appear in compound words, phrases, or titles where January functions as a temporal modifier. Its use is governed by standard Finnish grammar, reflecting the relationship to January rather than the position of a date within the month.