本美国国家标准的范围仅限于表示数据系统之间交换的日历日期；它没有描述日期是如何确定的。本标准不是为（也不排除）人类作为数据系统的输入或输出而设计的。本标准不涉及数据系统如何将数据转换为内部处理和/或存储。

The scope of this American National Standard is limited to the representation of calendar date for interchange among data systems; it does not describe how the date is determined. This standard was not designed for (nor does it preclude) usage by humans as input to, or output from data systems. This standard does not address how data is converted by data systems to be internally processed and/or stored.