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[Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>]

** Also affects: icu (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1838322

Title:
  Support Japanese new era "令和 (Reiwa)"

Status in icu package in Ubuntu:
  Fix Released
Status in icu source package in Xenial:
  New
Status in icu source package in Bionic:
  New
Status in icu source package in Disco:
  New

Bug description:
  [Background]
  Many packages are affected by the requirement to support the new era "Reiwa" (令和）

  This is the meta bug to track packages that need fixes; which packages
  have already been SRUd to previous releases, how to prioritize the
  work needed, and general test cases for verifying that things are
  working as expected.

  [Impact]
  Users who run Ubuntu in Japanese.

  [Test cases]

  Unicode data embedded into icu should include REIWA like it includes
  HEISEI.

  == Date conversion ==

  On applications that support writing dates in long form, or with
  symbols to denote era (either in X00.00.00 format or in GG1G5G1G
  format (G- glyph; X- character):

  1) Enable date formatting in each of the above formats that are supported (long form or symbols)
  2) Type in '2019/05/01' to be formatted, verify that it shows as "令和1年5月1日" or "R1.05.01"
  3) Type in '2019/04/30' to be formatted, verify that it shows as "平成31年4月30日" or "H31.4.30"

  == Character maps / font support ==

  1) Search for character "SQUARE ERA NAME"
  2) Verify that the results include at least "SQUARE ERA NAME HEISEI" and "SQUARE ERA NAME REIWA" (there should also be Syouwa, Taisyou and Meizi), and that the glyphs are readable:

   - SQUARE ERA NAME HEISEI: ㍻
   - SQUARE ERA NAME REIWA: 令和 (in a single glyph)

  Display of the Reiwa square glyph is font-specific; it may show simply
  as a empty square or a square with hex characters. If that is the
  case, the unicode data supports the new character, but the selected
  font does not include the new glyph.


  [Regression potential]
  This is a potentially large change as it impacts font display, character sets as well as date conversions. As such, extreme care should be taken to ensure that regressions are avoided, such that dates previous to May 1, 2019 continue to display as before, and dates onward are displayed with the new era symbols. The included test cases account for verifying the continued behavior or previous dates.

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