päev
Päev is the Estonian noun meaning the 24-hour period that runs from midnight to midnight, and, in common usage, also the daylight portion of that period. In everyday language the word is often linked to the day’s daylight hours, with night (öö) referring to the dark portion. In calendar and timekeeping contexts, päevi are counted and described by dates, such as “täna” (today) or “homne päev” (tomorrow).
Etymology and related forms: pä e v shares a high degree of similarity with the Finnish word
Timekeeping and seasonal variation: A civil day is 24 hours long on average, though the exact length
Cultural usage: Päev appears in everyday phrases about dates, schedules, and life events, and it is used