kuupäevavahemikud

A date range refers to a period of time defined by a start date and an end date. This concept is fundamental in various fields, including scheduling, historical analysis, data representation, and legal agreements. A date range allows for the specification of a continuous interval, encompassing all the days, weeks, months, or years between the two boundary dates.

In computing and databases, date ranges are often used to query for records that fall within a specific period. For example, one might search for all sales transactions that occurred between January 1st, 2023, and March 31st, 2023. This is crucial for filtering and analyzing time-series data.

Calendars and scheduling software heavily rely on date ranges to plan events, set deadlines, and manage appointments. A project timeline, for instance, is typically represented as a series of date ranges, each indicating the start and end of a particular task or phase.

In legal contexts, date ranges are used to define the duration of contracts, leases, or other agreements. These ranges clearly establish the period during which the terms of the agreement are in effect. Similarly, historical research often involves defining date ranges to focus on specific eras or periods of significant events.

The representation of a date range can vary. It can be inclusive, meaning both the start and end dates are part of the range, or exclusive, where one or both boundaries are not included. Common notation includes using a hyphen or "to" between the start and end dates, such as "2023-01-01 - 2023-03-31" or "January 1, 2023 to March 31, 2023". Understanding date ranges is essential for accurate time management and data interpretation.