Date [yyyy-mm-dd] Reference number 2000-12-19 ISO/TC 154 N 362 Supersedes document ISO/TC154N344 and 345 This document is still under study and subject to change. It should not be used for reference purposes. ISO/TC 154 REQUESTED ACTION Circulated to [see below] for: Processes, data elements and documents in commerce, industry and administration information discussion at [venue + yyyy-mm-dd of meeting] Chair: Mr. François Vuilleumier, OZD, CH-3003 Berne e-mail: <[email protected]> comments by [yyyy-mm-dd] Secretary: UN/ECE, Palais des Nations, CH-1211 Genève 10 voting by [yyyy-mm-dd] phone: (++ 41 22) 917 27 74 (Mr. Jean Kubler) or P-members only (ballot form attached) P-members of the technical committee or 917 24 75 (Mrs. Brigitte Ruby) subcommittee concerned have an obligation to vote. e-mail: <[email protected]> Circulation/ P- [ISO national body participating actively], Distribution O- [same, working as an observer] and L- [technical committees and organizations in liaison] members of ISO/TC 154 Title: ISO8601:2000(E) Data elements and interchange formats – Information interchange – Representation of dates and times Second edition 2000-12-15 Source: ISO/TC154, editor: Louis Visser NEN(NL) Status: Final draft, as edited and published by the ISO/CS Additional See Resolutions 187 of ISO/TC154-17. ISO8601:2000 is a Minor Revision of information: ISO8601:1988, also incorporating Technical Corrigendum 1:1991. NOTE: Resolution 188 of ISO/TC154-17 has launched, in parallel, a Full Revision of ISO8601, also to process the substantive comments received during this Minor Revision. ISO/TC 154 template, based on ISO general cover page, Version/V97.1 ISO 8601:2000(E) Contents Page Foreword.....................................................................................................................................................................iv Introduction .................................................................................................................................................................v 1 Scope ..............................................................................................................................................................1 2 Normative references ....................................................................................................................................1 3 Terms and definitions ...................................................................................................................................2 4 Fundamental principles ................................................................................................................................5 4.1 Basic concepts...............................................................................................................................................5 4.2 Common features, uniqueness and combinations ....................................................................................5 4.3 Time-units and reference systems...............................................................................................................6 4.3.1 Time-units.......................................................................................................................................................6 4.3.2 Date and time reference systems.................................................................................................................6 4.4 Characters used in the representations......................................................................................................8 4.5 Use of separators...........................................................................................................................................9 4.6 Truncation ......................................................................................................................................................9 4.7 Expansion.......................................................................................................................................................9 4.8 Leading zeros.................................................................................................................................................9 4.9 Mutual agreement ..........................................................................................................................................9 5 Representations...........................................................................................................................................10 5.1 Explanations.................................................................................................................................................10 5.1.1 Characters used in place of digits or signs ..............................................................................................10 5.1.2 Characters used as designators ................................................................................................................10 5.2 Dates .............................................................................................................................................................11 5.2.1 Calendar date ...............................................................................................................................................11 5.2.2 Ordinal date ..................................................................................................................................................13 5.2.3 Week date .....................................................................................................................................................13 5.3 Time of the day.............................................................................................................................................15 5.3.1 Local time of the day ...................................................................................................................................15 5.3.2 Midnight........................................................................................................................................................17 5.3.3 Coordinated Universal Time (UTC) ............................................................................................................17 5.3.4 Local time and Coordinated Universal Time.............................................................................................17 5.4 Combinations of date and time of the day ................................................................................................18 5.4.1 Complete representation ............................................................................................................................18 5.4.2 Representations other than complete .......................................................................................................19 5.5 Time-intervals...............................................................................................................................................20 5.5.1 Means of specifying time-intervals............................................................................................................20 5.5.2 Separators and designators .......................................................................................................................20 5.5.3 Representation of duration.........................................................................................................................20 5.5.4 Complete representations ..........................................................................................................................21 5.5.5 Representations other than complete .......................................................................................................23 5.6 Recurring time-intervals .............................................................................................................................23 5.6.1 Means of specifying recurring time-intervals ...........................................................................................23 5.6.2 Separators and designators .......................................................................................................................23 5.6.3 Complete representations ..........................................................................................................................24 5.6.4 Representations other than complete .......................................................................................................24 Annex A (informative) Relationship to ISO 2014, 2015, 2711, 3307 and 4031 .....................................................25 Annex B (informative) Examples .............................................................................................................................26 © ISO 2000 – All rights reserved iii ISO 8601:2000(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of