本文件规定了基于24小时时钟的公历日期和时间的表示，以及它们的复合元素，作为信息交换中使用的字符串。它也适用于表示基于协调世界时（UTC）的时间和时间偏移。 本文件不包括非公历中的日期元素，也不包括24小时制中的时间。本文件不涉及本文件中指定的表示的字符编码。

This document 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). This document excludes the representation of date elements from non-Gregorian calendars or times not from the 24-hour clock. This document does not address character encoding of representations specified in this document.