Bug #74701 [Com]: date("o", strtotime("2017-01-01")) returns "2016"

Edit report at https://bugs.php.net/bug.php?id=74701&edit=1 ID: 74701 Comment by: spam2 at rhsoft dot net Reported by: reinor2 at yandex dot ru Summary: date("o", strtotime("2017-01-01")) returns "2016" Status: Open Type: Bug Package: Date/time related Operating System: Linux PHP Version: 7.0.19 Block user comment: N Private report: N New Comment: read the manual and use 'Y' when you mean 'Y' ISO-8601 week-numbering year. This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. (added in PHP 5.1.0) php > echo date("W", strtotime("2017-01-01")); 52 Previous Comments: ------------------------------------------------------------------------ [2017-06-06 11:45:19] reinor2 at yandex dot ru Description: ------------ PHP 7.0.18-0ubuntu0.16.04.1 (cli) ( NTS ) Test script: --------------- date_default_timezone_set("UTC"); echo date("o", strtotime("2017-01-01")); // or, the same // echo (new DateTime("2017-01-01"))->format("o"); Expected result: ---------------- 2017 Actual result: -------------- 2016 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74701&edit=1