Vuodenajan

Vuodenajan is a Finnish term that refers to the time of the year and the characteristic seasonal cycle. It encompasses the four seasons—winter, spring, summer, and autumn—and the associated changes in weather, daylight, and ecosystems that mark each period.

In practice, the portion of the year assigned to a season varies with context. Meteorological definitions typically divide the year into three-month seasons, while astronomical definitions follow solstices and equinoxes. Cultural, regional, and agricultural calendars may define periods differently. The term highlights recurring annual patterns rather than fixed dates.

In Finland, seasonal timing strongly influences daily life, work, and tourism. The idea guides agricultural planning, forestry operations, and the development and marketing of seasonal products and services.

See also seasons, calendar, meteorology, and agriculture.