The following reply was made to PR standards/24898; it has been noted by GNATS.

From: "Greg A. Woods" <woods@planix.com>
To: "Wolfgang S. Rupprecht" <wolfgang@wsrcc.com>
Cc: jmc@netbsd.org, kleink@netbsd.org,
	NetBSD GNATS submissions and followups <gnats-bugs@netbsd.org>,
	gnats-admin@netbsd.org
Subject: Re: standards/24898: emacs thinks mktime is broken
Date: Fri, 4 Feb 2005 18:18:08 -0500 (EST)

 [ On Tuesday, February 1, 2005 at 15:09:22 (-0800), Wolfgang S. Rupprecht wrote: ]
 > Subject: Re: standards/24898: emacs thinks mktime is broken
 >
 > Is it valid to add an increment to some of the elements of struct tm
 > and get reliable answers?
 
 Yes, it is.  For example from the manual page:
 
 	[[....]]  The orig-
      inal values of the tm_wday and tm_yday components of the structure are
      ignored, and the original values of the other components are not re-
      stricted to their normal ranges. 
 
 >  I've always converted to
 > seconds-since-the-epoch, added the increment and converted back.
 
 That's normally what I've done too -- though if you've already got a
 "struct tm" handy then it's a lot easier to just add one to tm_day to
 advance exactly one day, for example, especially when your goal is to go
 back to a canonical time_t value.
 
 -- 
 						Greg A. Woods
 
 H:+1 416 218-0098  W:+1 416 489-5852 x122  VE3TCP  RoboHack <woods@robohack.ca>
 Planix, Inc. <woods@planix.com>          Secrets of the Weird <woods@weird.com>