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GB/T 7408.1-2023: Date and time - Representations for information interchange - Part 1: Basic rules
Status: Valid GB/T 7408.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7408.1-2023 | English | 764 |
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Date and time - Representations for information interchange - Part 1: Basic rules
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GB/T 7408.1-2023
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| GB/T 7408-2005 | English | 1039 |
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Data elements and interchange formats -- Information interchange -- Representation of dates and times
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GB/T 7408-2005
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| GB/T 7408-1994 | English | 719 |
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Data elements and interchange formats--Information interchange--Representation of dates and times
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GB/T 7408-1994
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| GB 7408-1987 | English | 199 |
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numbering of weeks
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GB 7408-1987
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PDF similar to GB/T 7408.1-2023
Basic data | Standard ID | GB/T 7408.1-2023 (GB/T7408.1-2023) | | Description (Translated English) | Date and time - Representations for information interchange - Part 1: Basic rules | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A13 | | Classification of International Standard | 35.020 | | Word Count Estimation | 42,470 | | Date of Issue | 2023-12-28 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 7408-2005 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7408.1-2023: Date and time - Representations for information interchange - Part 1: Basic rules
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 35:020
CCSA13
National Standards of People's Republic of China
Replace GB/T 7408-2005
Date and time information exchange representation
Part 1: Basic Principles
Part 1:Basicrules
(ISO 8601-1:2019,IDT)
Published on 2023-12-28
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
3:1 Terms and definitions 1
3:2 Symbol 8
4 Basic Principles10
4:1 Basic Rules 10
4:2 Time scale 10
4:3 Time scale components and units 12
4:4 Extended representation 14
4:5 Leading zeros 14
5 Date and time representation 15
5:1 Overview 15
5:2 Date 15
5:3 days of time 17
5:4 Date and time of day22
5:5 Time interval 24
5:6 Cycle time interval 26
Appendix A (informative) Examples of date and time expressions and representations 27
Reference 34
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is Part 1 of GB/T 7408 "Date and Time Information Exchange Representation": GB/T 7408 has released the following
part:
---Part 1: Basic principles:
This document replaces GB/T 7408-2005 "Data Element and Exchange Format Information Exchange Date and Time Representation" and is consistent with
Compared with GB/T 7408-2005, in addition to structural adjustments and editorial changes, the main technical changes are as follows:
---Changed the scope of the file (see Chapter 1, Chapter 1 of the:2005 edition);
---Added "time", "time axis", "time scale", "time scale unit", "clock timing system", "24-hour system", "coordinated universal time of day" and "standards"
Time" "Local Time Scale" "Time of Day" "Calendar" "Century Year" "Weekday Calendar" "Time Shift" "Clock Seconds" "Clock Minutes" "Clock Hours
hour" "calendar day of the week" "calendar day of the month" "calendar day of the year" "calendar week of the year" "year" "date and time
Expression", "date and time representation", "time scale component", "decimal symbol" terms and definitions (see 3:1);
---Changed the "Date", "Time", "Time Interval", "Time Length (Duration)", "Cycle Time Interval", "Coordinated Universal Time" and "Day's Local
Time" "Gregorian calendar" "Normal year" "Leap year" "Leap second" "Second" "Minute" "Hour" "Calendar date" "Sequential date" "Week date" "Day
(day)" "calendar day" "week" "calendar week" "month" "calendar month" "year" "calendar year" "century" "basic format" "extended format"
Terms and definitions of “full representation”, “reduced precision representation”, “decimal representation” and “extended representation” (see 3:1,:2005 Edition
Chapter 3);
---Deleted the term and definition of "truncated representation" (see:2005 version 3:22);
---Added "3:2 Symbols", as well as "Overview", "Time Scale Component Symbols" and "Composite Component Symbols" (see 3:2:1, 3:2:2, 3:2:3);
---Changed the "symbols replacing numbers or signs", "identifiers" and "separators" (see 3:2:4, 3:2:5, 3:2:6,:2005 version 5:1:1,
5:1:2, 4:5);
---Changed the "Basic Rules", "Gregorian Calendar", "Weekly Calendar", "Extended Representation" and "Leading Zeros" (see 4:1, 4:2:1, 4:2:2, 4:4, 4:5,
2005 edition 4:1, 4:3:2:1, 4:3:2:2, 4:7, 4:8);
---Added "24-hour format" and "time scale components and units" (see 4:2:3, 4:3);
---Deleted "Features common to single-term representation and combined representation", "Time unit", "Date", "Characters used in representation" and "Truncation"
Short representation" "agreed by both parties" (see:2005 edition 4:2, 4:3:1, 4:3:2:3, 4:4, 4:6, 4:9);
---Changed the "date and time representation" (see Chapter 5, Chapter 5 of the:2005 edition) and deleted the "truncated representation" in all representations
Law" (see 5:2:1:3, 5:2:2:2, 5:2:3:3, 5:3:1:4, 5:4:2, 5:6:4 of the:2005 edition):
This document is equivalent to ISO 8601-1:2019 "Date and time information exchange representation Part 1: Basic principles":
This document has made the following minimal editorial changes:
---Incorporated the amendments to ISO 8601-1:2019/AMd1:2022, the outer margins of the clauses involved are marked with vertical
Straight double lines (‖) are marked;
---Added examples (see 3:1:2:2, 3:1:2:4, 3:1:2:6, 3:1:2:11, 3:1:2:16, 3:1:2:19, 3:1:2:21):
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed and coordinated by the National Electronic Business Standardization Technical Committee (SAC/TC83):
This document was drafted by: Hangzhou Xianwei Technology Co:, Ltd:, Zhijiang Laboratory, Tsinghua University Shenzhen International Graduate School, Zhejiang Intelligent Technology
Technical Standards Innovation Promotion Association, Zhongke Standard (Ningde) Technology Co:, Ltd:, Zhejiang Maimang Technology Co:, Ltd:, Zhejiang Institute of Standardization, Hangzhou
Municipal Special Equipment Testing Research Institute, Zhejiang Institute of Water Resources and Hydropower, Jiangxi Institute of Quality and Standardization, Chongqing University, Xinjiang Uygur Autonomous Region
Special Equipment Inspection and Research Institute:
The main drafters of this document: Li Nanyang, Lu Xuanqi, Li Dongyang, Ma Longbo, Qiu Qian, Luan Junda, Feng Xin, Yang Yujiu, Fang Shishi, Zhang Jinyang,
Zhang Jianfang, Zhang Quanyou, Zhang Jun, Yang Shuo, Zhou Chang, Huang Zengyang:
The previous versions of this document and the documents it replaces are as follows:
---First published as GB/T 7408-1994 in:1994; ---First revised in:2005;
---This is the second revision:
Introduction
GB/T 7408 aims to provide a standard date and time format representation for information exchange to minimize misunderstandings and confusion:
risk: GB/T 7408 is planned to consist of 2 parts:
---Part 1: Basic principles: The purpose is to specify Gregorian calendar dates and times and their combinations based on the 24-hour clock
representation:
---Part 2: Extensions: The purpose is to specify the extended content of date and time representation and ensure the date and time when exchanging information:
accuracy of representation:
GB/T 7408 (all parts) adopts ISO 8601 (all parts) in one-to-one correspondence to ensure that the date and time format representation is consistent with
International standards: By formulating this series of standards, the relevant standard system will be improved:
Date and time information exchange representation
Part 1: Basic Principles
1 Scope
This document specifies the representation of Gregorian calendar dates and times and their combinations based on the 24-hour clock:
This document applies to date and time representations involved in the exchange of information: It also applies to times and times based on Coordinated Universal Time (UTC):
Time-shifted representation:
This document does not apply to non-Gregorian date representations or non-24-hour time representations: This document also does not give date and time
The character encoding of the representation:
2 Normative reference documents
This document has no normative references:
3 Terms, definitions and symbols
3:1 Terms and definitions
The following terms and definitions apply to this document:
3:1:1 Basic concepts
3:1:1:1
Date date
The time on the calendar time scale:
Note: Commonly used date formats include calendar date, sequential date, or weekday date:
3:1:1:2
time time
A mark of a moment or interval of time on a specific time scale:
Note 1: The term "time" is often used in everyday language and can be used only when its meaning is unambiguous in the context:
Note 2: On a time scale consisting of consecutive time intervals, such as a clock system or a calendar, different moments in time may be represented by the same time:
Note 3: This definition is close to the definition of the term "date" in 113-01-12 in IEC 60050-113:2011:
3:1:1:3
moment instant
Points on the timeline:
Note: Transient events occur at a specific moment:
[Source: IEC 60050-113:2011,113-01-08]
3:1:1:4
Time axis timeaxis
The unique axis on which instantaneous events are arranged for mathematical representation in terms of space-time and time:
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