If I understand correctly this will require CLDR 35.1, ICU 64.2 and Unicode 12.1 planned for 2019-05-07.

In T219728#5072818, @Aklapper wrote:

If I understand correctly this will require CLDR 35.1, ICU 64.2 and Unicode 12.1 planned for 2019-05-07.

I don't think so. I mean there could be other places that the Japanese era is used, but for the primary place I think all that needs to be modified is around line 1978 of language/Language.php (in Language::tsToYear).

Ah, good. Thanks!

Change 500391 had a related patch set uploaded (by Rxy; owner: Rxy):
[mediawiki/core@master] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/500391

Looks like the patch is good for go for that. Let see if any backport to the current supported branches is necessary or not.

In T219728#5088297, @shinjiman wrote:

Looks like the patch is good for go for that. Let see if any backport to the current supported branches is necessary or not.

I think need backport for current support versions

Change 505479 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@REL1_33] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505479

In T219728#5126845, @Rxy wrote:

The patch should be deployed to Japanese language sites until May 1 JST..

So next normal deploy to jawiki is may 2. So this change needs to be swatted to make the deadline. @Rxy : are you ok doing the sign up for swat, etc stuff? If not, let me know and I can handle that.

Change 500391 merged by jenkins-bot:
[mediawiki/core@master] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/500391

Change 505480 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@REL1_32] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505480

Change 505479 merged by jenkins-bot:
[mediawiki/core@REL1_33] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505479

This comment looks strange:

/**
* Algorithm to convert Gregorian dates to Thai solar dates,
* Minguo dates or Minguo dates.
*
* Link: https://en.wikipedia.org/wiki/Thai_solar_calendar
*       https://en.wikipedia.org/wiki/Minguo_calendar
*       https://en.wikipedia.org/wiki/Japanese_era_name
*
* @param string $ts 14-character timestamp
* @param string $cName Calender name
* @return array Converted year, month, day
*/

Is it supposed to say "Thai solar dates, Minguo dates or Japanese era names"?

Change 505485 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@wmf/1.34.0-wmf.1] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505485

Change 505486 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@REL1_31] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505486

In T219728#5127847, @Bawolff wrote:

In T219728#5126845, @Rxy wrote:

The patch should be deployed to Japanese language sites until May 1 JST..

So next normal deploy to jawiki is may 2. So this change needs to be swatted to make the deadline. @Rxy : are you ok doing the sign up for swat, etc stuff? If not, let me know and I can handle that.

https://wikitech.wikimedia.org/?diff=1824022 SWAT scheduled

Change 505488 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@REL1_30] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505488

In T219728#5127882, @Nirmos wrote:

This comment looks strange:

mediawiki/core / languages/Language.php

/**
* Algorithm to convert Gregorian dates to Thai solar dates,
* Minguo dates or Minguo dates.
*
* Link: https://en.wikipedia.org/wiki/Thai_solar_calendar
*       https://en.wikipedia.org/wiki/Minguo_calendar
*       https://en.wikipedia.org/wiki/Japanese_era_name
*
* @param string $ts 14-character timestamp
* @param string $cName Calender name
* @return array Converted year, month, day
*/

Is it supposed to say "Thai solar dates, Minguo dates or Japanese era names"?

oh, sure.

Minguo dates or Minguo dates should be Minguo dates or Japanese era names

Change 505480 merged by jenkins-bot:
[mediawiki/core@REL1_32] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505480

Change 505486 merged by jenkins-bot:
[mediawiki/core@REL1_31] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505486

Change 505489 had a related patch set uploaded (by Brian Wolff; owner: Rxy):
[mediawiki/core@REL1_27] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505489

Change 505488 abandoned by Brian Wolff:
Add support for new Japanese era name "Reiwa"

Reason:
1.30 isn't maintained anyways

https://gerrit.wikimedia.org/r/505488

Change 505489 merged by Brian Wolff:
[mediawiki/core@REL1_27] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505489

Change 505485 merged by jenkins-bot:
[mediawiki/core@wmf/1.34.0-wmf.1] Add support for new Japanese era name "Reiwa"

https://gerrit.wikimedia.org/r/505485

Mentioned in SAL (#wikimedia-operations) [2019-04-23T23:23:18Z] <jforrester@deploy1001> Synchronized php-1.34.0-wmf.1/languages/Language.php: SWAT T219728 Add support for new Japanese era name 'Reiwa' (duration: 00m 52s)