[转帖]History of Unicode Release and Publication Dates

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For ease of reference, this page collects together information about the dates for various releases of the Unicode Standard, as well as details regarding publication dates for the books and Unicode Technical Reports associated with Unicode releases.

Dates for Each Release of the Unicode Standard

The formal release dates for each version of the Unicode Standard, as documented in Enumerated Versions, have come to be associated with the date when the Unicode Character Database data files for a version have been completed and announced. However, note that for the very earliest versions of the Unicode Standard, there were no data files; the release of data files started with Version 2.0.0.

For major and minor versions, the release dates may differ from the publication dates for the associated documentation. In particular, Unicode Standard Annexes carry their own dates, which mark the last date the document was modified before the Unicode release date for that version. Prior to Version 10.0, the publication dates for the Unicode book and the Unicode core specifications are later than the corresponding Unicode release date, because of the longer time it took to complete their editing for publication. Starting from Version 10.0, core specification publication dates are simultaneous with Unicode release dates.

Unicode Release Dates

Version	Year	Month (Day)
15.1.0	2023	September 12
15.0.0	2022	September 13
14.0.0	2021	September 14
13.0.0	2020	March 10
12.1.0	2019	May 7
12.0.0	2019	March 5
11.0.0	2018	June 5
10.0.0	2017	June 20
9.0.0	2016	June 21
8.0.0	2015	June 17
7.0.0	2014	June 16
6.3.0	2013	September 30
6.2.0	2012	September 26
6.1.0	2012	January 31
6.0.0	2010	October 11
5.2.0	2009	October 1
5.1.0	2008	April 4
5.0.0	2006	July 14
4.1.0	2005	March 31
4.0.1	2004	March
4.0.0	2003	April
3.2.0	2002	March
3.1.1	2001	August
3.1.0	2001	March
3.0.1	2000	August
3.0.0	1999	September
2.1.9	1999	April
2.1.8	1998	December
2.1.5	1998	August
2.1.2	1998	May
2.0.0	1996	July
1.1.5	1995	July
1.1.0	1993	June
1.0.1	1992	June
1.0.0	1991	October

Version 1.1.5 was not a release formally approved by the Unicode Technical Committee. However, the very first version of UnicodeData.txt became available in July, 1995. It contained data for the repertoire of Unicode 1.1, and that data file has come to be known as Unicode Version 1.1.5.

Publication Dates for the Unicode Core Specification

Title	Year	Month (Day)	ISBN
The Unicode Standard, Version 15.0	2022	September 13	978-1-936213-32-0
The Unicode Standard, Version 14.0	2021	September 14	978-1-936213-29-0
The Unicode Standard, Version 13.0	2020	March 10	978-1-936213-26-9
The Unicode Standard, Version 12.0	2019	March 5	978-1-936213-22-1
The Unicode Standard, Version 11.0	2018	June 5	978-1-936213-19-1
The Unicode Standard, Version 10.0	2017	June 20	978-1-936213-16-0
The Unicode Standard, Version 9.0	2016	July 19	978-1-936213-13-9
The Unicode Standard, Version 8.0	2015	August 20	978-1-936213-10-8
The Unicode Standard, Version 7.0	2014	October 8	978-1-936213-09-2
The Unicode Standard, Version 6.2	2012	November 16	978-1-936213-07-8
The Unicode Standard, Version 6.1	2012	April 23	978-1-936213-02-3
The Unicode Standard, Version 6.0	2011	February 18	978-1-936213-01-6
The Unicode Standard, Version 5.2	2009	December 23	978-1-936213-00-9

A separate core specification for Version 6.3 was never published, in part because it would have been trivially distinct from the core specification for Version 6.2 and in part because of the priority given to the major editorial work required to prepare Version 7.0.

The first five chapters of the core specification for Version 5.2 were published the same day as the data release: October 1, 2009. The remaining chapters were published December 23, 2009.

Publication Dates for Print-on-Demand Editions

Title	Year	Month (Day)	Vol	ISBN	Status
The Unicode Standard, Version 14.0	2021	November 12	1	978-1-936213-30-6	in print
			2	978-1-936213-31-3	in print
The Unicode Standard, Version 13.0	2020	May 8	1	978-1-936213-27-6	OOP
			2	978-1-936213-28-3	OOP
The Unicode Standard, Version 12.0	2019	June 12	1	978-1-936213-23-8	OOP
			2	978-1-936213-24-5	OOP
The Unicode Standard, Version 11.0	2018	July 13	1	978-1-936213-20-7	OOP
			2	978-1-936213-21-4	OOP
The Unicode Standard, Version 10.0	2017	August 25	1	978-1-936213-17-7	OOP
			2	978-1-936213-18-4	OOP
The Unicode Standard, Version 9.0	2016	September 20	1	978-1-936213-14-6	OOP
			2	978-1-936213-15-3	OOP
The Unicode Standard, Version 8.0	2015	November 18	1 & 2	978-1-936213-11-5	OOP
The Unicode Standard, Version 7.0	2015	January 16	1 & 2	978-1-936213-09-2	OOP
The Unicode Standard, Version 6.2	2012	December 18	1 & 2	978-1-936213-07-8	OOP
The Unicode Standard, Version 6.1	2012	May 25	1 & 2	978-1-936213-02-3	OOP

Print-on-demand (POD) editions have been published via lulu.com. They typically are made available shortly after the core specification for a particular Unicode version is published online. They then stay in print until the core specification for the succeeding version of the Unicode Standard is published. At that point they are taken out of print (OOP), because the new version of the Unicode Standard supersedes the older POD edition.

No POD edition is planned for Version 15.0 of the core specification. The 14.0 POD edition is still available for the convenience of people who would like a printed copy of the core specification, although it is formally superseded by Version 15.0 of the Unicode Standard.

Publication Dates for the Unicode Standard Books

Title	Year	First Printing Date	ISBN	CDROM
The Unicode Standard, Version 5.0	2007	October, 2006	0-321-48091-0	✓
The Unicode Standard, Version 4.0	2003	August	0-321-18578-1	✓
The Unicode Standard, Version 3.0	2000	January	0-201-61633-5	✓
The Unicode Standard, Version 2.0	1996	July	0-201-48345-9	✓
The Unicode Standard, Version 1.0, Volume 2	1992	June	0-201-60845-6
The Unicode Standard, Version 1.0, Volume 1	1991	October	0-201-56788-1

Note that for various reasons involving the publication production schedule, the publication dates for Version 3.0 and Version 5.0 are the subsequent year after the date associated with the data release for that version.

Version 2.0 had multiple print runs. The third printing was dated July, 1998.

Publication Dates of UTRs for Minor Releases

Title	Report Number	Date
The Unicode Standard, Version 3.2	UAX #28	March 27, 2002
The Unicode Standard, Version 3.1	UAX #27	May 16, 2001
The Unicode Standard, Version 2.1	UTR #8	September 4, 1998
The Unicode Standard, Version 1.1	UTR #4	1993

UTR #8, the reference documentation for Version 2.1, was originally published on September 4, 1998. However, an updated Revision 3 of UTR #8 was published on November 21, 1999, to correct some formatting problems in the HTML of Revision 2 of the report.

In addition to the published books and UAXes or UTRs documenting released versions of the Unicode Standard, there were a number of identifiable pre-publication drafts of the first version of the Unicode Standard. Some of these drafts were intended for internal review; others were bound and were widely distributed for public review. The following table identifies major milestone drafts and dates for this pre-publication history of the standard.

Dates of Pre-publication Drafts

Title	Author	Date	Distribution
The Unicode Standard, Worldwide Character Encoding, Version 1, Pre-Copy-Edit Draft	The Unicode Consortium	May 7, 1991	Members
Unicode 1.0, Draft Standard, Final Review Document	The Unicode Consortium	December, 1990	Public
Unicode 1.0, Han Character Supplement, Draft Standard, Final Review Document	The Unicode Consortium	December, 1990	Public
Unicode Preview	The Unicode Consortium	October, 1990	Public
Unicode Working Draft	Unicode90 Consortium	August, 1990	UWG
Unicode 88	Joseph D. Becker, Ph.D.	August 29, 1988

The Unicode 88 document is the original Unicode manifesto, authored by Joe Becker. It developed the basic principles for the Unicode design and briefly outlined the history and status of the "Unicode Proposal" as of 1988. Some of its content was reworked for inclusion in the early Unicode pre-publication drafts.

The August, 1990 document was a very rough working draft for the standard. The editors and the Unicode Working Group (UWG)―the predecessor of the UTC―used it to help lay out the anticipated content and structure of the standard. It contained no code charts or block descriptions. This draft preceded the final decision about the eventual name of the Unicode Consortium—hence the odd name of the consortium on the title page. The Unicode Consortium was not officially incorporated until January 3, 1991.

The October, 1990 draft was fairly widely distributed. It contained very abbreviated introductory text, initial drafts of the code charts, the first draft of the character names index, the first draft of multi-column Unihan charts, and various mapping tables. It was referred to at the time as "Unicode 0.9".

The December, 1990 drafts were even more widely distributed, including to many international reviewers. They were used to elicit public feedback on the draft standard. They put the participating SC2 national bodies on notice that the Unicode Consortium was serious about developing and publishing its standard. The first volume contained a more extended introduction, a full draft of the non-Han code charts, including the first version of the character names list. It also contained the first drafts of the block descriptions. The second volume contained the multi-column Unihan charts and the draft of the Han block introduction. At the time these draft volumes were referred to collectively as the "Final Review Draft".

The May 7, 1991 draft was complete content, intended for final Unicode Consortium membership review and approval, of the non-Han part of the draft standard prior to copy editing with the eventual publisher, Addison-Wesley.