fix: The time zone offset is incorrectly calculated when the DST exits at 00:00.

[xingyixiang]

fix: #2834 #2303

[xingyixiang]

Can you help review the code? Thanks @iamkun

[xingyixiang]

America/Asuncion时区是0点跳变所以会出现这个问题。测试了2024-03-24的夏令时跳变也是有问题的。所以如果是在0点跳变夏令时的都是有问题的这是一个共性问题。

This problem occurs because the America/Asuncion time zone changes from 00:00. Tested 2024-03-24 DST jump is also problematic. Therefore, if the DST is changed at 00:00, it is a common problem.

it('test America/Asuncion', () => {
  const testDate = dayjs('2024-03-24T03:20:57.000+00:00').tz('America/Asuncion').format('YYYY-MM-DD HH:mm:ssZ')
  expect(testDate).toBe('2024-03-23 23:20:57-04:00')
})

Result "2024-03-23 23:20:57-05:00"

[Qiming-Liu]

Please add test, thanks!

[xingyixiang]

npm run test-tz4

Before

After

done @Qiming-Liu

[Qiming-Liu]

Nice work!
Sorry, I am not the contributor of this repo, I can't help review.
But I don't think you shouldn change package.json

[xingyixiang]

Nice work! Sorry, I am not the contributor of this repo, I can't help review. But I think you shouldn't change package.json

Okay, thank you.
The test case cannot run in the Windows environment. Therefore, some modifications are made.

[Qiming-Liu]

Yeah, that's fine. Before creating the pull request, you can remove the changes that were made to package.json.