vuorokauden

Vuorokauden is the genitive singular form of vuorokausi, a Finnish noun that refers to a 24-hour day or to a full 24-hour period. The term is used when describing time frames within a day or durations that span a complete day.

Vuorokausi is a compound of vuoro (turn, shift) and kausi (period), reflecting the idea of a complete daily cycle. The genitive form vuorokauden is used to express possession or relation to that 24-hour cycle, for example in vuorokauden aikana (during the 24-hour period), vuorokauden loppuun mennessä (by the end of the 24-hour period), or vuorokauden ympäri (around the clock, throughout the day). In phrases involving numbers, Finnish typically uses the base noun in plural form, with the genitive singular vuorokauden appearing when indicating a single 24-hour span.

Common uses include describing time frames for schedules, deadlines, or durations. Examples of typical expressions are vuorokauden aikana, vuorokauden kuluessa, and vuorokauden ympäri. For instance: Häiriö ilmenee yleisesti vuorokauden aikana. Toimitus tapahtuu vuorokauden kuluessa. Tartunta on ollut viimeisen vuorokauden aikana.

See also: vuorokausi, time measurement in Finnish, common time-related phrases in Finnish.