`IntlDateFormatter` returns wrong output for 1940 date in Amsterdam timezone

Description

The following code:

<?php

$timezone = new DateTimeZone("Europe/Amsterdam");
$date = new DateTime("1940-01-01 00:00:00", $timezone);
var_dump($date);

$formatter = new IntlDateFormatter("en-US");
var_dump($formatter->format($date));

Resulted in this output:

object(DateTime)#2 (3) {
  ["date"]=>
  string(26) "1940-01-01 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(16) "Europe/Amsterdam"
}
string(69) "Sunday, December 31, 1939 at 11:40:00 PM Coordinated Universal Time"

But I expected this output instead:

object(DateTime)#2 (3) {
  ["date"]=>
  string(26) "1940-01-01 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(16) "Europe/Amsterdam"
}
string(48) "Monday, January 1, 1940 at 12:00:00 AM GMT+00:20"

Additional details

Until 16 May 1940, The Netherlands used UTC+00:20 as timezone. It looks like IntlDateFormatter is not aware of the UTC+00:20 timezone, so it outputs the date in UTC.

The occurrence of the problem seems related to the version of the ICU library:

I am not familiar enough with the ICU library to assess whether the problem originates there. Since the wrong output is present in PHP when using the latest versions (of PHP and the ICU library), I am submitting the bug here.

PHP Version

8.2.4

Operating System

No response

Commencez par reproduire l’exemple de IntlDateFormatter pour Europe/Amsterdam et comparez les versions d’ICU listées dans l’issue, en utilisant les Dockerfiles Debian et latest-ICU référencés. Déterminez si le décalage historique incorrect vient de PHP ou d’ICU ; le travail est considéré comme terminé lorsque le formateur renvoie le résultat attendu 1940 UTC+00:20 ou que l’issue est documentée comme une limitation upstream d’ICU.