DOCUMENT:Q39908 25-JUL-2001 [visualc] TITLE :Time Functions Calculate for Daylight Savings Time PRODUCT :Microsoft C Compiler PROD/VER:winnt: OPER/SYS: KEYWORDS:kb16bitonly ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - The C Run-Time (CRT), included with: - Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, 6.0ax - Microsoft C for OS/2, versions 5.1, 6.0, 6.0a - Microsoft C/C++ for MS-DOS, version 7.0 - Microsoft Visual C++, versions 1.0, 1.5 ------------------------------------------------------------------------------- The Microsoft time functions calculate for daylight saving time. In particular, mktime() will set the hour ahead or back one hour according to the rules of daylight saving time. The only way to change the dates that the time functions use in calculating daylight saving time is to get the run-time library source code available for the time functions and modify the routine _isindst() in the file TZSET.C. Additional query words: kbinf 1.00 1.50 6.00 6.00a 6.00ax 7.00 ====================================================================== Keywords : kb16bitonly Technology : kbVCsearch kbAudDeveloper kbCRT Version : winnt: ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.