Add topic "ISO 8601"

Author: shaedrich

topics/iso-8601/index.md

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+---
+aliases: iso8601
+related: datetime, date-format, iso-standard, edtf, date-time, timestamp, gregorian-calendar, unix-timestamp, iso8601-duration, iso8601-period
+created_by: International Organization for Standardization
+display_name: ISO 8601
+released: June 1988
+short_description: ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.
+topic: iso-8601
+url: https://www.iso.org/iso-8601-date-and-time-format.html
+wikipedia_url: https://en.wikipedia.org/wiki/ISO_8601
+---
+**ISO 8601** is an ISO standard that specifies representations of dates of the Gregorian calendar and times based on the 24-hour clock, as well as composite elements of them, as character strings for use in information interchange. It is also applicable for representing times and time shifts based on Coordinated Universal Time (UTC).