For additional information, please see the following article in the
Microsoft Knowledge Base:
194699 Extended Log File Format Always in GMT
In Service Pack 4, the behavior was changed so that Log files roll over at
midnight according to the local time zone when metabase property ID 4015 is set to 1 using MetaEdit (shipped with the IIS Resource Kit) for each concerned Web site.
You can use the following command to add this metabase key:
mdutil.exe SET -svc w3svc -i 1 -utype UT_SERVER -dtype DWORD -attrib INHERIT -prop 4015 -value 1
Where
-svc is the name of the service (for FTP, the service would be MSFTPSVC) and
-i is set to the number of the Web site where you want to set the logging parameter.