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<?php $date = \DateTime::createFromFormat('d.m.Y H:i:s', '01.01.1900 00:00:00', new \DateTimeZone('Europe/Berlin')); var_dump($date); $date->setTimezone(new DateTimeZone('UTC')); var_dump($date);
Output for 5.5.24, 5.6.8, 5.6.15 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(DateTime)#2 (3) { ["date"]=> string(26) "1900-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } object(DateTime)#2 (3) { ["date"]=> string(26) "1899-12-31 23:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }
Output for 5.5.25 - 5.5.35, 5.6.9 - 5.6.14
object(DateTime)#2 (3) { ["date"]=> string(26) "1900-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } object(DateTime)#2 (3) { ["date"]=> string(26) "1899-12-31 23:06:32.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }

preferences:
154 ms | 402 KiB | 183 Q