Bug #81562 [Ver->Nab]: DateTime returns incorrect time on a very specific date (1895-01-01)
Edit report at https://bugs.php.net/bug.php?id=81562&edit=1
ID: 81562
Updated by: derick@php.net
Reported by: abrlam at yahoo dot com
Summary: DateTime returns incorrect time on a very specific
date (1895-01-01)
-Status: Verified
+Status: Not a bug
Type: Bug
Package: Date/time related
Operating System: Ubuntu 18.04.4 LTS
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
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
This turned out to be correct. Look at the transitions:
derick@gargleblaster:~$ zdump -v America/Toronto -c 0,1900
America/Toronto Tue Jan 1 05:17:31 1895 UT = Mon Dec 31 23:59:59 1894 LMT isdst=0 gmtoff=-19052
America/Toronto Tue Jan 1 05:17:32 1895 UT = Tue Jan 1 00:17:32 1895 EST isdst=0 gmtoff=-18000
The date/time "1895-01-01 00:00:00 America/Toronto" does not exist, as at that exact point
the area changed timezones to advance by 17m32s (1052s difference in UTC offset).
PHP and timelib handle this correctly.
Previous Comments:
------------------------------------------------------------------------
[2021-10-29 11:29:08] cmb@php.net
Confirmed: <https://3v4l.org/NLAnOY>.
This is apparently caused by the uncommon timezone transition on
that particular date[1], where the minutes and seconds are not
properly handled.
[1] <https://3v4l.org/VEUib>
------------------------------------------------------------------------
[2021-10-28 18:32:33] abrlam at yahoo dot com
Description:
------------
When time zone is set as America/Toronto, DateTime returns incorrect time on a very specific date
(1895-01-01).
This happens in PHP version 7.4.20 and possibly in earlier versions (>=7.3.5).
Test script:
---------------
//fails in 1895-01-01
for($i = 1890; $i <= 1910 ; $i++) {
$date = new DateTime( $i. '-01-01', new DateTimeZone('America/Toronto'));
echo $date->format('Y-m-d H:i:s') . "<br />";
}
Expected result:
----------------
For 1895-01-01, it should be 1895-01-01 00:00:00 instead of 1895-01-01 00:17:32.
Actual result:
--------------
1890-01-01 00:00:00
1891-01-01 00:00:00
1892-01-01 00:00:00
1893-01-01 00:00:00
1894-01-01 00:00:00
1895-01-01 00:17:32 <========== Expected value: 1895-01-01 00:00:00
1896-01-01 00:00:00
1897-01-01 00:00:00
1898-01-01 00:00:00
1899-01-01 00:00:00
1900-01-01 00:00:00
1901-01-01 00:00:00
1902-01-01 00:00:00
1903-01-01 00:00:00
1904-01-01 00:00:00
1905-01-01 00:00:00
1906-01-01 00:00:00
1907-01-01 00:00:00
1908-01-01 00:00:00
1909-01-01 00:00:00
1910-01-01 00:00:00
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=81562&edit=1
Thread (5 messages)