ajavahemikus

Ajavahemikus is an Estonian phrase meaning “in the time interval.” It is the inessive form of ajavahemik (time interval) and is used to indicate that something occurs, applies, or is valid during a defined period. The expression is common in formal and informal Estonian, including science, journalism, law, and daily speech. For example, one might say ajavahemikus 1. jaanuarist 31. jaanuarini or ajavahemikus kell 9–12.

In mathematical and data contexts, ajavahemik refers to a set of time values between a start and an end time. The phrase ajavahemikus is used to denote that a time point or a measurement lies within that interval. Depending on conventions, interval boundaries may be inclusive or exclusive, reflecting whether endpoints are considered part of the interval (for example [a, b] versus [a, b)).

Practical use: In data analysis, scheduling, and reporting, events are described as occurring or being valid ajavahemikus. This appears in time-series filtering, experiment windows, workflow triggers, and regulatory or archival contexts where results are said to hold ajavahemikus.

See also: Time interval, time window, Estonian grammar, windowing.