Description
This National Standard is applicable whenever representation of dates in the Gregorian calendar, times in the 24- hour timekeeping system, time intervals and recurring time intervals or of the formats of these representations are included in information interchange.
TABLE OF CONTENTS
| Contents | Page |
| 0 Introduction | vi |
| 1 Scope | 1 |
| 2 Terms and definitons | 1 |
| 2.1 Basic concepts | 1 |
| 2.2 Time units, nominal durations and time intervals | 4 |
| 2.3 Representations and formats | 6 |
| 3 Fundamental principles | 7 |
| 3.1 Basic rules | 7 |
| 3.2 Time scales | 7 |
| 3.3 Representations and format representations | 9 |
| 3.4 Characteristics used in the representations | 9 |
| 3.5 Expansion | 11 |
| 3.6 Leading zeros | 11 |
| 3.7 Mutual Agreement | 11 |
| 4 Date and Time representations | 11 |
| 4.1 Date…………….. | 11 |
| 4.2 Time of day | 14 |
| 4.3 Date and time of day | 17 |
| 4.4 Time interval | 18 |
| 4.5 Recurring time interval | 22 |
| 5 Date and time representations | 23 |
| Annex A (informative) Relationship to ISO 2014, ISO 2015, ISO 2711, ISO 3307 and ISO 4031 | 24 |
| Annex B (informative) Examples of representations | 25 |
| Bibliography | 31 |