Doc #63597 [Asn->Csd]: easter_date ignores PHP's timezone and uses the TZ env variable

Edit report at https://bugs.php.net/bug.php?id=63597&edit=1 ID: 63597 Updated by: aharvey@php.net Reported by: anon at anon dot anon Summary: easter_date ignores PHP's timezone and uses the TZ env variable -Status: Assigned +Status: Closed Type: Documentation Problem Package: Documentation problem PHP Version: 5.4.9 Assigned To: aharvey Block user comment: N Private report: N New Comment: This bug has been fixed in the documentation's XML sources. Since the online and downloadable versions of the documentation need some time to get updated, we would like to ask you to be a bit patient. Thank you for the report, and for helping us make our documentation better. Previous Comments: ------------------------------------------------------------------------ [2012-11-26 02:53:36] aharvey@php.net Automatic comment from SVN on behalf of aharvey Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=328495 Log: Add a note about the timezone gotcha in easter_date(). Fixes doc bug #63597 (easter_date ignores PHP's timezone and uses the TZ env variable). ------------------------------------------------------------------------ [2012-11-26 02:39:25] aharvey@php.net Thanks for your well reasoned, not at all abusive bug report, anonymous. Anyway, there is an actual issue here that isn't documented, which is that easter_date() uses the libc date handling functions, which means it's beholden to the TZ environment variable and not PHP's default time zone. There's a pretty simple workaround using easter_days() and DateTime::add(), so I'll get a note into the documentation to demonstrate that. ------------------------------------------------------------------------ [2012-11-25 15:13:17] anon at anon dot anon Description: ------------ The easter_date function magics a random timezone out of the air, rendering it worthless. Test script: --------------- <?php date_default_timezone_set('UTC'); for ($year = 1970; $year <= 2037; $year++) { echo gmdate('Y-M-d H:i:s', easter_date($year)) . "\n"; } Actual result: -------------- 1970-Mar-29 00:00:00 1971-Apr-10 23:00:00 1972-Apr-01 23:00:00 1973-Apr-21 23:00:00 1974-Apr-13 23:00:00 1975-Mar-30 00:00:00 1976-Apr-17 23:00:00 1977-Apr-09 23:00:00 1978-Mar-26 00:00:00 1979-Apr-14 23:00:00 1980-Apr-05 23:00:00 1981-Apr-18 23:00:00 1982-Apr-10 23:00:00 1983-Apr-02 23:00:00 1984-Apr-21 23:00:00 1985-Apr-06 23:00:00 1986-Mar-30 00:00:00 1987-Apr-18 23:00:00 1988-Apr-02 23:00:00 1989-Mar-26 00:00:00 1990-Apr-14 23:00:00 1991-Mar-31 00:00:00 1992-Apr-18 23:00:00 1993-Apr-10 23:00:00 1994-Apr-02 23:00:00 1995-Apr-15 23:00:00 1996-Apr-06 23:00:00 1997-Mar-30 00:00:00 1998-Apr-11 23:00:00 1999-Apr-03 23:00:00 2000-Apr-22 23:00:00 2001-Apr-14 23:00:00 2002-Mar-31 00:00:00 2003-Apr-19 23:00:00 2004-Apr-10 23:00:00 2005-Mar-27 00:00:00 2006-Apr-15 23:00:00 2007-Apr-07 23:00:00 2008-Mar-23 00:00:00 2009-Apr-11 23:00:00 2010-Apr-03 23:00:00 2011-Apr-23 23:00:00 2012-Apr-07 23:00:00 2013-Mar-31 00:00:00 2014-Apr-19 23:00:00 2015-Apr-04 23:00:00 2016-Mar-27 00:00:00 2017-Apr-15 23:00:00 2018-Mar-31 23:00:00 2019-Apr-20 23:00:00 2020-Apr-11 23:00:00 2021-Apr-03 23:00:00 2022-Apr-16 23:00:00 2023-Apr-08 23:00:00 2024-Mar-31 00:00:00 2025-Apr-19 23:00:00 2026-Apr-04 23:00:00 2027-Mar-28 00:00:00 2028-Apr-15 23:00:00 2029-Mar-31 23:00:00 2030-Apr-20 23:00:00 2031-Apr-12 23:00:00 2032-Mar-28 00:00:00 2033-Apr-16 23:00:00 2034-Apr-08 23:00:00 2035-Mar-25 00:00:00 2036-Apr-12 23:00:00 2037-Apr-04 23:00:00 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63597&edit=1