Bug #79580 [Com]: date_create_from_format misses leap year

Edit report at https://bugs.php.net/bug.php?id=79580&edit=1 ID: 79580 Comment by: rowan dot collins at gmail dot com Reported by: mcab at acm dot org Summary: date_create_from_format misses leap year Status: Verified Type: Bug Package: Date/time related Operating System: Linux PHP Version: 7.2.30 Block user comment: N Private report: N New Comment: It looks like the problem is that the 'z' specifier works by setting "month=1, day=X" (in this case, "the 60th of January"), then normalising the date immediately. But at that point, it doesn't know what year to use for the normalisation, so picks 1970 (which wasn't a leap year). https://heap.space/xref/php-src/ext/date/lib/parse_date.c?r=9c608bd1#25213 If you reverse the format, you get the expected result, because the correct year has already been selected when the "normalise" call happens: $TZ=timezone_open( "UTC" ); $refdate=date_create_from_format ( "Y z" ,"2020 60" ,$TZ ); echo date_format($refdate,"d/m/Y"); # 01/03/2020 A possible fix would be to delay the call to timelib_do_normalize until after the whole input has been parsed, including the year specifier. Previous Comments: ------------------------------------------------------------------------ [2020-05-10 13:41:20] cmb@php.net Confirmed: <https://3v4l.org/Drfk6>. ------------------------------------------------------------------------ [2020-05-10 13:22:00] mcab at acm dot org Description: ------------ date_create_from_format when format is 'z Y' is a day out when day number is after feb28. Test script: --------------- $TZ= timezone_open( "UTC" ); $refdate=date_create_from_format ( "z Y" ,"31 2020" ,$TZ ); echo date_format($refdate,"d/m/Y")."<br>"; $refdate=date_create_from_format ( "z Y" ,"60 2020" ,$TZ ); echo date_format($refdate,"d/m/Y")."<br>"; $refdate=date_create_from_format ( "z Y" ,"91 2020" ,$TZ ); echo date_format($refdate,"d/m/Y")."<br>"; $refdate=date_create_from_format ( "z Y" ,"121 2020" ,$TZ ); echo date_format($refdate,"d/m/Y")."<br>"; $refdate=date_create_from_format ( "z Y" ,"130 2020" ,$TZ ); echo date_format($refdate,"d/m/Y")."<br>"; /* Output is 01/02/2020 02/03/2020 <- This has missed the fact that 2020 is a leap year 02/04/2020 <- All future date are wrong 02/05/2020 11/05/2020 */ ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79580&edit=1