Working Group
WG 5
Date and time
Overview
WG 5 provides a common platform for all date and time stakeholders, to enable a unified, interoperable of date and time across populations and systems. It publishes the ISO 8601 family of standards in ubiquitous use today.
WG 5 was established to manage ISO 8601, the international date time standard.
Scope
The scope of WG5 is to provide a common platform for all date and time stakeholders, to enable a unified, interoperable of date and time across populations and systems.
Specifically, the work involves the standardization of concepts and semantics related to date and time, systems and processes that use or measure date and time, and the interoperability of information systems that utilize date and time.
Standards
17 standards maintained under this group
- ISO 2014:1976Writing of calendar dates in all-numeric form
- ISO 2015:1976Numbering of weeks
- ISO 2711:1973Information processing interchange — Representation of ordinal dates
- ISO 3307:1975Information interchange — Representations of time of the day
- ISO 34000:2023Date and time — Vocabulary
- ISO 4031:1978Information interchange — Representation of local time differentials
- ISO 8601-1:2019/Amd 1:2022Date and time — Representations for information interchange — Part 1: Basic rules — Amendment 1: Technical corrections
- ISO 8601-1:2019Date and time — Representations for information interchange — Part 1: Basic rules
- ISO 8601:1988/Cor 1:1991Data elements and interchange formats — Information interchange — Representation of dates and times — Technical Corrigendum 1
- ISO 8601:1988Data elements and interchange formats — Information interchange — Representation of dates and times
- ISO 8601-2:2019/Amd 1:2025Date and time — Representations for information interchange — Part 2: Extensions — Amendment 1: Canonical expressions, extensions to time scale components and date time arithmetic
- ISO 8601-2:2019Date and time — Representations for information interchange — Part 2: Extensions
- ISO 8601:2000Data elements and interchange formats — Information interchange — Representation of dates and times
- ISO 8601:2004Data elements and interchange formats — Information interchange — Representation of dates and times
- ISO/AWI 34000Date and time — Vocabulary
- ISO/AWI 8601-1Date and time — Representations for information interchange — Part 1: Basic rules
- ISO/AWI 8601-2Date and time — Representations for information interchange — Part 2: Extensions