NBN EN 28601 : 1993

National foreword
Committees responsible
Specification
0. Introduction
1. Scope and field of application
2. References
3. Terms and definitions
4. Fundamental principles
5. Representations
Annexes
A. Relationship to ISO 2014, 2015, 2711, 3307 and 4031
B. Examples of representation of dates, time of the day,
     combinations of data and time, and periods of time

Explains the representation of dates in the Gregorian calender including calendar dates expressed in terms of year, month and day of month; ordinal dates expressed in terms of year and day of year; dates identified by means of year, week numbers and day numbers; time of the day based upon the 24-hour timekeeping system; differences between local time and Coordinated Universal Time, combination of date and time and periods of time, with or without either a start or end date or both.