Description:
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Problem: An email message sent with the mail() function under PHP 4.3.10 on Windows 2000 has an incorrect Date header during Daylight Savings Time.

The identical problem was reported in http://bugs.php.net/bug.php?id=28685. However, in that closed bug report, it was claimed that PHP does not add a Date header.

I believe that PHP does send a Date header, and an incorrect one at that. When I telnet to my SMTP server, and manually send an email that is missing the Date header, the SMTP server adds a correct one. When I send an email, to the same SMTP server, using the mail() function in PHP 4.3.10 under Windows 2000, the Date header is incorrect. I am certain that it is PHP that is generating the incorrect Date header.

Another bug report also talks about this problem:
http://bugs.php.net/bug.php?id=24912

That report makes mention of the Windows Date Control Panel. 
Interestingly, a call to date( 'r' ) returns the expected string, and pays attention to the setting in the Date Control Panel. However, mail() sends the same non-daylight-savings-time string no matter how the Date Control Panel is set. 

Perhaps mail() could simply call PHP's own date( 'r' ) function?


Reproduce code:
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mail('mike-php@emerge2.com', 'My Subject', 'This is a test.');


Expected result:
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(other headers omitted)
Date: Tue, 05 Apr 2005 15:28:59 -0400


Actual result:
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(other headers omitted)
Date: Tue, 05 Apr 2005 15:28:59 -0500