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ISO 8601-1:2019/Amd 1:2022

Date and time — Representations for information interchange — Part 1: Basic rules — Amendment 1: Technical corrections

ISO PREVIEW or BUY Date and time
Stage 60.60 ICS 01.140.30

The published version of ISO 8601-1:2019 contained a number of technical errors introduced by the ISO publication process. ISO/TC 154/WG 5 has alerted ISO/CS about those problems during the publication process, but due to how the process proceeds, WG 5 was not allowed to fix them.

CalConnect therefore proposed Amd 1 to fix these issues.

This amendment achieves the following goals with regards to ISO 8601-1:2019:

  1. Corrects technical errors introduced by the ISO publication process in ISO 8601-1:2019.

  2. Correction in newly discovered errors in NOTEs and EXAMPLEs.

  3. Clarification of representation between time scale unit and instant

  4. Definition and usage of "Ending of day" (re-introduction)

Clarifies that the ISO 8601-1 representations are used for representing a time scale unit (with a duration) as well as an instant (with no duration).

Corrections in this document apply to the follow clauses in ISO 8601-1:2019:

  • 3.1.1.24, Note 2 to entry

  • 3.1.2.15, Note 1 to entry

  • 4.2.2, NOTE

  • 4.2.3, first paragraph

  • 4.3.2, add second paragraph

  • 4.3.2, third paragraph

  • 4.3.11, add first paragraph

  • 4.3.12, add first paragraph

  • 5.3.1.4, second paragraph

  • 5.5.1, fourth paragraph

  • 5.3.2, title

  • 5.3.2, replace clause

ISO 8601:2000 and ISO 8601:2004 provides representations of the following concepts "beginning of day", which is a "representation" of the event of "start of day" Using "00:00:00" "end of day", which is a "representation" of the event of "end of day" Using "24:00:00"

ISO 8601-1:2019 removed the representation of "end of day", Amd 1 reinstates it (in a different way).

ISO 8601:2000 and 2004 provides representations of the following concepts

  • "beginning of day", a "representation" of the "start of day" instant using "00:00:00"

  • "end of day", a "representation" of the "end of day" instant using "24:00:00"

ISO 8601-1:2019 kept "beginning of day" but removed "end of day" (will be explained in a later slide)

German legal system determines that the end of the day != the beginning of the next day e.g., expiry date of 2022-04-05 means until 2022-04-05 24:00:00, not 2022-04-06 00:00:00 Removal of "24:00:00" caused some impact in usage circles (W3C XML, ISO 20022…) Decided to reinstate this concept