WG 5

Date and time

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.

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.

Members

CH

Cheng CHI

Member

SAC, China
CH

Chiye SUN

Member

SAC, China
DE

Dehui YANG

Member

SAC, China
ER

Erich Kesse

Member

BSI, United Kingdom
HI

Hiroshi Masamoto

Member

JISC, Japan
HY

Hye Jin Lee

Member

KATS, Korea, Republic of
HY

HyoungDo Kim

Member

KATS, Korea, Republic of
HY

Hyun-Ju Jo

Member

KATS, Korea, Republic of
IL

Il Jeon

Member

KATS, Korea, Republic of
Jasmine Jaegyong Chang

Jasmine Jaegyong Chang

Member

KATS, Korea, Republic of
JA

Jason Polis

Member

BSI, United Kingdom
JE

Jenny Hertzfeldt

Member

DIN, Germany
Jianfang Zhang

Jianfang Zhang

Member

SAC, China
JI

Jiankang Yao

Member

SAC, China
JI

Jingyo Song

Member

KATS, Korea, Republic of
JO

Jong-Il Lee

Member

KATS, Korea, Republic of
JU

Jungnam Lee

Member

KATS, Korea, Republic of
KA

Kang Hae Lee

Member

KATS, Korea, Republic of
KA

Kazuya Miyazaki

Member

JISC, Japan
KE

Kenji Urushima

Member

JISC, Japan
KE

Kenta Nishikubo

Member

JISC, Japan
KE

Keong Ju Choi

Member

KATS, Korea, Republic of
KY

Kyeongrim Ahn

Member

KATS, Korea, Republic of
MA

Mark Hedley

Member

BSI, United Kingdom
MA

Martina Paul

Member

SNV, Switzerland
MA

Masashi Sato

Member

JISC, Japan
MI

Mi Young Choi

Member

KATS, Korea, Republic of
Naoto Miyachi

Naoto Miyachi

Member

JISC, Japan
NE

neda alipasandi

Member

INSO, Iran
Pan Wei

Pan Wei

Member

SAC, China
PE

Peter Rybar

Member

UNMS, Slovakia
QI

Qifei ZHANG

Member

SAC, China
RU

Rudolf Borges

Member

DIN, Germany
RU

Ruotian GAO

Member

SAC, China
SE

Seung Uk Kwon

Member

KATS, Korea, Republic of
Shi Yu

Shi Yu

Member

SAC, China
SH

Shunyuan Jiang

Member

SAC, China
Sue Probert

Sue Probert

Member

BSI, United Kingdom
SU

Sung Jae Kim

Member

KATS, Korea, Republic of
SU

Sun Ho Park

Member

KATS, Korea, Republic of
TA

Tae-Uk Ahn

Member

KATS, Korea, Republic of
VE

Veit Jahns

Member

DIN, Germany
WO

Won-Tae Baek

Member

KATS, Korea, Republic of
XI

Xiang WANG

Member

SAC, China
XI

Xiantang SUN

Member

SAC, China
XI

Xianyu Bao

Member

SAC, China
XI

Xiaoyu YOU

Member

SAC, China
XI

Xin Wang

Member

SAC, China
YA

Yanning FU

Member

SAC, China
YO

Yongkon Lee

Member

KATS, Korea, Republic of
YU

Yue JING

Member

SAC, China
YU

Yun Xing

Member

SAC, China
ZH

Zhipeng LI

Member

SAC, China

Series

ISO 8601-1
ISO 8601-1:2019 published 25 March 2019 Date and time — Representations for information interchange — Part 1: Basic rules
ISO 8601-1:2019/Amd 1:2022 published 25 October 2022 Date and time — Representations for information interchange — Part 1: Basic rules — Amendment 1: Technical corrections
ISO 8601-2
ISO 8601-2:2019 published 25 March 2019 Date and time — Representations for information interchange — Part 2: Extensions
ISO 8601-2:2019/Amd 1:2025 published 01 January 2025 Date and time — Representations for information interchange — Part 2: Extensions — Amendment 1: Canonical expressions, extensions to time scale components and date time arithmetic
ISO 8601 Withdrawn
ISO 8601:1988/Cor 1:1991 published 01 January 1991 Data elements and interchange formats — Information interchange — Representation of dates and times — Technical Corrigendum 1

Individual Standards

ISO 34000:2023 published 01 January 2023 Date and time — Vocabulary
ISO/AWI 34000 published 01 January 4000 Date and time — Vocabulary
ISO/AWI 8601-1 Date and time — Representations for information interchange — Part 1: Basic rules
ISO/AWI 8601-2 Date and time — Representations for information interchange — Part 2: Extensions
ISO 2014:1976 published 01 January 1976 Writing of calendar dates in all-numeric form
ISO 2711:1973 published 01 January 1973 Information processing interchange — Representation of ordinal dates
ISO 3307:1975 published 01 January 1975 Information interchange — Representations of time of the day
ISO 4031:1978 published 01 January 1978 Information interchange — Representation of local time differentials
ISO 8601:1988 published 01 January 1988 Data elements and interchange formats — Information interchange — Representation of dates and times
ISO 8601:2000 published 01 January 2000 Data elements and interchange formats — Information interchange — Representation of dates and times
ISO 8601:2004 published 01 January 2004 Data elements and interchange formats — Information interchange — Representation of dates and times

Collaborative Parties

CalConnect

CalConnect, the Calendaring and Scheduling Consortium, is a Category A liaison of ISO/TC 154.

CalConnect is focused on the interoperable exchange of calendaring and scheduling information between dissimilar programs, platforms, and technologies. Our mission is to promote general understanding of and provide mechanisms to allow interoperable calendaring and scheduling methodologies, tools and applications to enter the mainstream of computing.

CalConnect’s TC DATETIME is heavily engaged with all WG 5 projects, including its contribution to ISO 8601-2:2019.

Current collaborative projects:

ITU-T

ITU is a Category A liaison with ISO/TC 154, with specific interest in the activities of WG 5.

From its inception in 1865, ITU-T has driven a contribution-led, consensus-based approach to standards development in which all countries and companies, no matter how large or small, are afforded equal rights to influence the development of ITU-T Recommendations. From its beginnings as a body standardizing international telegraph exchange, through its formative role in telecommunications, and in today’s converged ICT ecosystem, ITU-T has provided the world’s best facilities to the global standardization community and remains the world’s only truly global ICT standards body.

ITU-T is the standardization arm of ITU, the United Nations specialized agency for information and communication technologies – ICTs.

History

WG 5 was established to manage ISO 8601, the international date time standard.