"Why do people [with NT systems] change the system time to deal with daylight savings changes?" Because that's the way MS-DOS did it. On Unix systems, the hardware clock runs in UTC, and the TZ variable is used to determine the difference between UTC and local time (including allowing for daylight Saving if appropriate), and local time is output by the various utilities. On MS-DOS systems, and their 'Windows' heirs and successors, the hardware clock is the direct source of system time, so it runs local time. The new-fangled (Windows95?) automatic time zone management simply writes a new value into the hardware clock on the motherboard on 'flip-over' from summer to winter time. As I understand it, even Vista and Windows Server 2008 still work that way. Horrible.
[Digression: I wonder how a VM-ed Windows environment copes with that? Can you have different VMs in different Time Zones on the same real host? Can you use VMs to 'time travel', by setting the date/time on one VM to a completely different value to another and/or to the real time on the host?] Regards Mike -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ken Wallis Sent: Tuesday, 10 March 2009 10:00 a.m. To: [email protected] Subject: RE: [U2] time Verb Why do people change the system time to deal with daylight savings changes? On unix systems you just have to set the TZ environment variable correctly - for example the AIX patches associated with this just change the default TZ settings for certain zones. On Windows there is a utility called tzedit.exe that came with NT and which has to be googled for on later versions which lets you change the relevant registry settings. Cheers, Ken -----Original Message----- From: On Behalf Of George Gallen Our unix system does the same thing. (older unix that thinks we are still doing daylight savings shift on the old date). UV is showing the same time as the unix time. So, if the NT reset it's time, you might need to shutdown UV, then restart it, for it to get the correct system time from NT, unless you have an old version of NT as well (unpatched), so NT has the incorrect system time as well?? George > -----Original Message----- > > I am using an old version of UniVerse on a NT, this morning when I > changed the > system time to adjust for Daylight savings time the UniVerse time is > not 1 > hour behind. Anyone know if there is a fix? > I poked around and didn't find a way to adjust it. So I reset the > system time > so that the UniVerse time is correct. > > Dave R ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ The information contained in this Internet Email message is intended for the addressee only and may contain privileged information, but not necessarily the official views or opinions of the New Zealand Defence Force. If you are not the intended recipient you must not use, disclose, copy or distribute this message or the information in it. If you have received this message in error, please Email or telephone the sender immediately. ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/
