Knowra ISO 8601 ISO 8601 ISO 8601 is an international standard for representing dates, times, and time intervals in text. Its ordered, numeric forms reduce ambiguity across languages and regions.
Gregorian calendar : The solar calendar used internationally for civil dates, with years, months, and days. ISO 8601 date forms commonly express dates in this calendar.
Extended date format : An ISO 8601 date form that separates year, month, and day with hyphens, such as 2024-06-30. Hyphens make the standard’s full calendar-date form easier to read.
Timestamp : A value that records a date, time, or both, often to locate an event chronologically. ISO 8601 supplies a widely used textual form for timestamps.
Date format by country : Regional conventions for writing dates, including differing orders for day, month, and year. Forms such as 03/04/2024 can be ambiguous where ISO ordering is not used.
Coordinated Universal Time : The primary international time standard, maintained using atomic clocks and adjusted when needed to stay close to Earth rotation. The standard uses UTC as the reference behind its Z time designator.
Basic date format : An ISO 8601 date form that writes year, month, and day consecutively without separators, such as 20240630. Removing separators produces a compact alternative to the extended date form.
Date and time notation in computing : Conventions and data formats for representing dates and times in software systems. ISO 8601 is a central interoperable notation within this broader practice.
Unix time : A count of seconds from the Unix epoch, conventionally 1970-01-01 00:00:00 UTC. It encodes time as a numeric instant rather than a human-readable calendar string.
UTC offset : The difference between a local time and Coordinated Universal Time, usually expressed in hours and minutes. Offsets attach local clock readings to a globally interpretable time.
ISO week date : A week-based date system identifying a week-year, week number, and weekday. It offers an alternative to month-and-day dates, especially for weekly planning.
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