Bug #68195 [Opn->Nab]: Issue with day number / name in a week

Edit report at https://bugs.php.net/bug.php?id=68195&edit=1 ID: 68195 Updated by: requinix@php.net Reported by: sandro dot casa at gmail dot com Summary: Issue with day number / name in a week -Status: Open +Status: Not a bug Type: Bug -Package: Calendar related +Package: Date/time related Operating System: Windows NT SCA 6.1 build 7601 (W PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Unless you're running one of the experimental builds of PHP x64 for Windows (and probably not even then), your PHP cannot handle 1900 as a Unix timestamp. It's too far in the past for a 32-bit number. strtotime() will fail, which means it will return false, which is basically 0, which corresponds to 1970-01-01. Try it: echo date('r', strtotime($date)); Fortunately, DateTime works differently. $date = new DateTime('1900-01-01'); echo $date->format('N'); // 1 echo $date->format('l'); // Monday Previous Comments: ------------------------------------------------------------------------ [2014-10-09 07:55:06] sandro dot casa at gmail dot com Description: ------------ --- From manual page: http://www.php.net/function.date --- l (lowercase 'L'): A full textual representation of the day of the week Sunday through Saturday N ISO-8601: numeric representation of the day of the week (added in PHP 5.1.0) 1 (for Monday) through 7 (for Sunday) My PHP version is 5.5.6 Test script: --------------- // My PHP version is 5.5.6 $date = '1900-01-01'; echo date('N', strtotime($date)); // ==> 4 echo date('l', strtotime($date)); // ==> Thurday The thing is the 1st of Jan 1900 was a Monday... Expected result: ---------------- $date = '1900-01-01'; echo date('N', strtotime($date)); // ==> 1 echo date('l', strtotime($date)); // ==> Monday ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=68195&edit=1