#38781 [WFx->Bgs]: strtotime() generates wrong date for 11th month 2007 on.

ID: 38781 Updated by: danielc@php.net Reported By: rpk at npstrategy dot com -Status: Wont fix +Status: Bogus Bug Type: Date/time related Operating System: Linux Fedora Core 4 PHP Version: 4.4.4 New Comment: <?php /* * The United States changed Daylight Savings Time * Start: * <= 2006: First Sunday in April at 2:00 am * >= 2007: Second Sunday in March at 2:00 am * End: * <= 2006: Last Sunday in October at 2:00 am * >= 2007: First Sunday in November at 2:00 am * * http://aa.usno.navy.mil/faq/docs/daylight_time.html */ // SPRING ------------------------------ // 2006 //$t1 = strtotime('2006-03-05 02:30:00'); //$t2 = strtotime('2006-03-05 01:30:00'); // // 2007 //$t1 = strtotime('2007-03-04 01:30:00'); //$t2 = strtotime('2007-03-04 02:30:00'); // -------------------------------------- // FALL -------------------------------- // 2006 //$t1 = strtotime('2006-10-22 01:30:00'); //$t2 = strtotime('2006-10-22 02:30:00'); // // 2007 $t1 = strtotime('2007-10-21 01:30:00'); $t2 = strtotime('2007-10-21 02:30:00'); // -------------------------------------- $step = 60 * 60 * 24 * 7; // Increment one week for ($i = 0; $i < 6; $i++) { echo $t1 . ' = ' . date('r', $t1) . "\n"; echo $t2 . ' = ' . date('r', $t2) . "\n"; echo "---\n"; $t1 = $t1 + $step; $t2 = $t2 + $step; } OUTPUT: ------- 1192944600 = Sun, 21 Oct 2007 01:30:00 -0400 1192948200 = Sun, 21 Oct 2007 02:30:00 -0400 --- 1193549400 = Sun, 28 Oct 2007 01:30:00 -0400 1193553000 = Sun, 28 Oct 2007 02:30:00 -0400 --- 1194154200 = Sun, 04 Nov 2007 01:30:00 -0400 1194157800 = Sun, 04 Nov 2007 01:30:00 -0500 --- 1194759000 = Sun, 11 Nov 2007 00:30:00 -0500 1194762600 = Sun, 11 Nov 2007 01:30:00 -0500 --- 1195363800 = Sun, 18 Nov 2007 00:30:00 -0500 1195367400 = Sun, 18 Nov 2007 01:30:00 -0500 --- 1195968600 = Sun, 25 Nov 2007 00:30:00 -0500 1195972200 = Sun, 25 Nov 2007 01:30:00 -0500 Previous Comments: ------------------------------------------------------------------------ [2006-09-12 08:31:43] tony2001@php.net I still can not reproduce it. month11_2006_date for Friday 2006 = 17(correct) month11_2007_date = 16 (wrong) Anyway, we're not going to do any major changes in PHP4. The datetime related code was rewritten in 5.1, which you should use instead. ------------------------------------------------------------------------ [2006-09-11 21:28:49] rpk at npstrategy dot com running program http://southo.org/date_test.php Code: $month11_2006_timestamp = mktime(0,0,0,11,1,2006); $month11_2006_day_timestamp = strtotime("3 Friday",$month11_2006_timestamp); $month11_2006_date = date('j',$month11_2006_day_timestamp); echo"<h1>month11_2006_date for Friday 2006 = $month11_2006_date (correct)</h1>"; $month11_2007_timestamp = mktime(0,0,0,11,1,2007); $month11_2007_day_timestamp = strtotime("3 Friday",$month11_2007_timestamp); $month11_2007_date = date('j',$month11_2007_day_timestamp); echo"<h1>month11_2007_date = $month11_2007_date (wrong)</h1>"; ------------------------------------------------------------------------ [2006-09-11 18:29:09] tony2001@php.net Can't reproduce with both 4.4 and 5.2. I get 17 and 16, both are correct results. Also, please try to be more clear when you provide reproduce code. Lot of HTML and text do not add any understanding. ------------------------------------------------------------------------ [2006-09-11 18:16:17] rpk at npstrategy dot com Description: ------------ strtotime starts generating wrong timestamps in November, 2007. Only wrong in the month of November. Rest of months are ok. strtotime("3 Friday", $november_2006_timestamp) generates correct timestamp with date which is the 3rd Friday in November 2006. strtotime("3 Friday", $november_2007_timestamp) generates wrong timestamp with date which should be the 3rd Friday in November 2007. The date generated is -1 day, in this case, Thursday in the month of November, 2007. All dates generated are wrong in the months of November. Tested up to 2009. Every other month works ok. Reproduce code: --------------- <?php $month11_2006_timestamp = mktime(0,0,0,11,1,2006); $month11_2006_day_timestamp = strtotime("3 Friday",$month11_2006_timestamp); $month11_2006_date = date('j',$month11_2006_day_timestamp); echo"<h1>month11_2006_date for Friday 2006 = $month11_2006_date (correct)</h1>"; echo"<h1>This correctly shows the 3rd Friday date for November, 2006 </h1>"; //test of strtotime() generating date string for day in 3 week in November 2007 $month11_2007_timestamp = mktime(0,0,0,11,1,2007); $month11_2007_day_timestamp = strtotime("3 Friday",$month11_2007_timestamp); $month11_2007_date = date('j',$month11_2007_day_timestamp); echo"<h1>month11_2007_date = $month11_2007_date (wrong)</h1>"; echo"<h1>This incorrectly shows the 3rd Friday date for November, 2007 <br>as the 15th of November 2007 which is a Thursday. <p>Every day-date generated from November 2007-2009 produces at -1 day from the standard. So other days are also wrong. It is always November. The other months work fine.</p></h1>"; Expected result: ---------------- month11_2006_date for Friday 2006 = 17 (correct) This correctly shows the 3rd Friday date for November, 2006 month11_2007_date = 15 (wrong) This incorrectly shows the 3rd Friday date for November, 2007 as the 15th of November 2007 which is a Thursday. Every day-date generated from November 2007-2009 produces at -1 day from the standard. So other days are also wrong. It is always November. The other months work fine. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=38781&edit=1