php - UNIX 时间戳(0) : Europe/London returns UTC+1

Question

学习约会，他们现在让我很难受。

$london = new DateTime();
$london->setTimestamp(0);
$london->setTimeZone(new DateTimeZone('Europe/London'));

echo $london ->format('d-m-Y H-i-s');

结果:

01-01-1970 01-00-00

UTC +0:00 不应该是伦敦，所以是午夜？例如，纽约返回前一个日期的 19:00，这是正确的 UTC -5:00。莫斯科返回 01-01-1970 03-00-00 这又是不正确的(UTC +3:00 而不是 UTC +4:00)

不过，当不使用 ->setTimestamp 时，伦敦当前时间会正确呈现。

直播码:http://sandbox.onlinephpfunctions.com/

此外，我本地的时区是欧洲/布拉格 (UTC +1:00)。也使用 date_default_timezone_set('Europe/London') 进行了测试。

我想我的逻辑有问题吗？

Answer 1

这是因为显然，英国在 British Summer Time 上1970 年 1 月 1 日，比 UTC 早一小时(强调我的):

An inquiry during the winter of 1959–60, in which 180 national organisations were consulted, revealed a slight preference for a change to all-year GMT+1, but the length of summer time was extended as a trial rather than the domestic use of Greenwich Mean Time abolished.[6] A further inquiry during 1966–67 led the government of Harold Wilson to introduce the British Standard Time experiment, with Britain remaining on GMT+1 throughout the year. This took place between 27 October 1968 and 31 October 1971, when there was a reversion to the previous arrangement.

timeanddate.com 的 Time Zone Converter是查找此类内容的绝佳工具。