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Bug #10550 mktime() returns -1 for certain valid dates
Submitted: 2001-04-29 06:46 UTC Modified: 2001-09-09 06:02 UTC
From: chris dot php at bolt dot cx Assigned: derick (profile)
Status: Closed Package: Date/time related
PHP Version: 4.0 Latest CVS (29/04/2001) OS: FreeBSD 3.4-RELEASE
Private report: No CVE-ID: None
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From: chris dot php at bolt dot cx
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 [2001-04-29 06:46 UTC] chris dot php at bolt dot cx 
$ cat test.php 
<?=
mktime(1, 18, 27, 4, 1, 2001) . "\n" .
mktime(2, 18, 27, 4, 1, 2001) . "\n" .
mktime(3, 18, 27, 4, 1, 2001) . "\n";
?>
$ php -q test.php 
986113107
-1
986116707
$

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 [2001-04-29 07:05 UTC] chris dot php at bolt dot cx 
Correction:

$ cat test.php 
<?=
gmmktime(1, 18, 27, 4, 1, 2001, 0) . "\n" .
gmmktime(2, 18, 27, 4, 1, 2001, 0) . "\n" .
gmmktime(3, 18, 27, 4, 1, 2001, 0) . "\n";
?>
$ php -q test.php 
986087907
-21601
986098707
$
 [2001-04-29 11:20 UTC] derick@php.net 
I could not reproduce this under Linux. Will try later with OpenBSD. As PHP uses the underlying C functions for this, this might actaully be a problem with FreeBSD.

Derick
 [2001-04-29 11:27 UTC] avsm@php.net 
It doesn't occur under OpenBSD; it looks like a FreeBSD issue (happens on 4.x-STABLE as well).  This came up recently on the Horde/Chora list:

http://marc.theaimsgroup.com/?l=chora&m=98622313207343&w=2
 [2001-04-29 15:11 UTC] hholzgra@php.net 
daylight saving related??? (u
 [2001-09-09 06:02 UTC] derick@php.net 
Closing this one, as it seems an issue with FreeBSD's daylight savings time.
 [2001-09-09 06:02 UTC] derick@php.net 
I said closed
 [2002-10-08 11:26 UTC] giovani-spagnolo at procergs dot rs dot gov dot br 
It?s really a FreeBSD?s daylight savings bug.

Try:

mktime(0,0,0,10,13,2002) and you?ll get -1.

13/10/2001 is the first day in daylight savings time.

This problem also occurs on windows98.
 
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