Issue #15742 has been updated by duerst (Martin D=FCrst).


mame (Yusuke Endoh) wrote:
> Thanks, that's good to know.  However, we should wait for the new revisio=
n of JIS X 0301.  Could you let us know if the spec is actually revised?

It may be that the spec is revised, but this usually takes quite some time.=
 I'd personally suggest we move ahead so that this new functionality can be=
 used as soon as possible in Ruby.

----------------------------------------
Misc #15742: Add Date#jisx0301 support new Japanese era
https://bugs.ruby-lang.org/issues/15742#change-77411

* Author: kaishuu0123 (Koki Oyatsu)
* Status: Feedback
* Priority: Normal
* Assignee: =

----------------------------------------
## Reproduce process

```
irb(main):002:0> require 'date'
=3D> true
irb(main):003:0> Date.new(2019, 5, 1).jisx0301
=3D> "H31.05.01"
```

* ruby version: trunk

## Result of reproduce process

```
irb(main):003:0> Date.new(2019, 5, 1).jisx0301
=3D> "H31.05.01"
```

## Expected result and the reason why you expect

```
irb(main):002:0> require 'date'
=3D> true
irb(main):003:0> Date.new(2019, 5, 1).jisx0301
=3D> "R01.05.01"
```

### reason

* new era (Reiwa?) starts from 2019/05/01
* refs: https://github.com/ruby/ruby/blob/trunk/ext/date/date_core.c#L7049
* I can't be sure that initial letter is "R".



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