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Issues with PHP 8.1 DateTimeImmutable when handling timezone conversions in a Laravel application

๐Ÿ‘€ Views: 34 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-04
php laravel datetime timezone

I'm confused about Hey everyone, I'm running into an issue that's driving me crazy... I'm experiencing an unexpected behavior when using `DateTimeImmutable` in my Laravel application (version 8.0) while converting timezones. I have a function that takes a UTC datetime string and converts it to a specific timezone, but it seems to return an incorrect time. Here's the function I'm using: ```php public function convertToTimezone(string $utcDateTime, string $timezone): string { $date = new DateTimeImmutable($utcDateTime, new DateTimeZone('UTC')); return $date->setTimezone(new DateTimeZone($timezone))->format('Y-m-d H:i:s'); } ``` When I call this function with the following input: ```php echo convertToTimezone('2023-10-01 12:00:00', 'America/New_York'); ``` I expect it to output `2023-10-01 08:00:00` since Eastern Daylight Time (EDT) is UTC-4. However, Iโ€™m getting `2023-10-01 09:00:00` instead. Iโ€™ve checked the serverโ€™s timezone settings and they are correct (`UTC`), and Iโ€™ve also verified that the `America/New_York` timezone is correctly set in the `php.ini`. To troubleshoot, I added a line to output the current timezone before conversion: ```php echo 'Current timezone: ' . date_default_timezone_get(); ``` This shows `UTC`, so that seems fine. Is there a known issue with the `DateTimeImmutable` class in PHP 8.1 related to daylight savings time or timezone calculations that might cause this behavior? I've also tried using `DateTime` instead of `DateTimeImmutable`, but it yields the same result. Any guidance on how to resolve this would be appreciated! For context: I'm using Php on Ubuntu 20.04. What would be the recommended way to handle this? I'm working on a mobile app that needs to handle this. Thanks for any help you can provide!