Bug #74691 [Nab]: Novosibirsk Data Time Anomaly

Edit report at https://bugs.php.net/bug.php?id=74691&edit=1 ID: 74691 User updated by: karpulix at ya dot ru Reported by: karpulix at ya dot ru Summary: Novosibirsk Data Time Anomaly Status: Not a bug Type: Bug Package: Date/time related Operating System: All PHP Version: 7.1.5 Block user comment: N Private report: N New Comment: Because regardless of the time zone in the period beetween from 02.06.2015 to 02.06.2017 should be the same number of seconds. This is an axiom. No? ------------ Потому что независимо от часового пояса в промежутке от 02.06.2015 до 02.06.2017 должно быть одинаковое количество секунд. Это аксиома. Previous Comments: ------------------------------------------------------------------------ [2017-06-04 08:58:29] heiglandreas@php.net Why do you think the diff doesn't provide the data correctly? After all there IS one hour missing in the diff. You might want something different from it but that's a different story. The difference between anytime on the 2nd of June 2015 in "Asia/Novosibirsk" and the same time on the 2nd of June 2017 in Asia/Novosibirsk is 1 year, 11 months, 30 days and 23 hours. So I'd really be interested why you think it doesn't "provide the data correctly" ------------------------------------------------------------------------ [2017-06-04 08:12:47] karpulix at ya dot ru But in fact diff does not provide the data correctly. Maybe need to fix the problem at the level of the environment? ----------- Но фактически diff предоставляет неверные данные. Может быть нужно исправлять проблему на уровне окружения? ------------------------------------------------------------------------ [2017-06-04 07:53:29] heiglandreas@php.net The diff method works pretty well, you are only looking at a fraction of the result though. When you look at https://3v4l.org/6eiD6 you will notice that the difference is 1 year, 11 months, 30 days and 23 hours. Due to the DST-change it's 1 hour short of being two years! ------------------------------------------------------------------------ [2017-06-02 12:14:36] karpulix at ya dot ru Because of this, the method works incorrectly "diff" from "DateTime class" ----- Из-за этого неверно работает метод "diff" класса DateTime //correct: $dataTimeZone = new DateTimeZone("Europe/Moscow"); $datetime = new DateTime('02.06.2015',$dataTimeZone); $now = new DateTime('02.06.2017',$dataTimeZone); $interval = $datetime->diff($now); $fullYear = (int)$interval->format("%Y"); echo $fullYear; // 2 - its correct //incorrect $dataTimeZone = new DateTimeZone("Asia/Novosibirsk"); $datetime = new DateTime('02.06.2015',$dataTimeZone); $now = new DateTime('02.06.2017',$dataTimeZone); $interval = $datetime->diff($now); $fullYear = (int)$interval->format("%Y"); echo $fullYear; // 1 - its incorrect ------------------------------------------------------------------------ [2017-06-02 11:33:26] derick@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Actually, I see what happens. There is no bug. Unlike Moscow and New_York, Novosibirsk changed GMT offsets between June 2nd,2015 and June 2nd, 2017. Moscow: Europe/Moscow Sat Mar 26 23:00:00 2011 UT = Sun Mar 27 03:00:00 2011 MSK isdst=0 gmtoff=14400 Europe/Moscow Sat Oct 25 21:59:59 2014 UT = Sun Oct 26 01:59:59 2014 MSK isdst=0 gmtoff=14400 Europe/Moscow Sat Oct 25 22:00:00 2014 UT = Sun Oct 26 01:00:00 2014 MSK isdst=0 gmtoff=10800 (Last change was in 2014 to UTC+3) New York UTC+3 Novosibirsk: Asia/Novosibirsk Sat Mar 26 20:00:00 2011 UT = Sun Mar 27 03:00:00 2011 +07 isdst=0 gmtoff=25200 Asia/Novosibirsk Sat Oct 25 18:59:59 2014 UT = Sun Oct 26 01:59:59 2014 +07 isdst=0 gmtoff=25200 Asia/Novosibirsk Sat Oct 25 19:00:00 2014 UT = Sun Oct 26 01:00:00 2014 +06 isdst=0 gmtoff=21600 Asia/Novosibirsk Sat Jul 23 19:59:59 2016 UT = Sun Jul 24 01:59:59 2016 +06 isdst=0 gmtoff=21600 Asia/Novosibirsk Sat Jul 23 20:00:00 2016 UT = Sun Jul 24 03:00:00 2016 +07 isdst=0 gmtoff=25200 UTC+6 in 2015, and UTC+7 in 2017. That's why you get the 3600 seconds difference. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=74691 -- Edit this bug report at https://bugs.php.net/bug.php?id=74691&edit=1