Kesäaikana

Kesäaikana is a Finnish adverb that means “during the summer.” The term is used to describe conditions or periods associated with the summer season, but it can also refer to the time when daylight saving time (kesäaika) is in effect. In practice, kesäaikana can denote the calendar summer (roughly June to August in Finland) or the summer-time period defined by clocks being set forward one hour.

In the context of timekeeping, kesäaika refers to daylight saving time. In Finland, kesäaika means the period when clocks are moved forward one hour in spring and back one hour in autumn. During kesäaika, Finland uses Eastern European Summer Time (EEST, UTC+3); outside kesäaika, it uses Eastern European Time (EET, UTC+2). The transition generally follows the last Sunday in March for the start and the last Sunday in October for the end.

The concept has practical implications for daily life, scheduling, and energy use. Kesäaikana days are longer, which influences outdoor activities, tourism, and transportation timetables. Businesses and public services may adjust hours and communication accordingly, and households often experience changes in lighting and temperature management.

Examples of usage include: Kesäaikana Suomessa päivät ovat pitkiä. Kellon siirtämisen vuoksi kesäaikana aikataulut voivat poiketa talvikauden aikatauluista. Kesäaikaan iltaisin on valoisampaa ja ulkoilma-aktiviteetit lisääntyvät.