OT: Really cool daylight-savings-time tool

riredale wrote on 3/4/2007, 4:59 PM
Thanks to Congress, the USA next week is changing the dates when local time zones switch from Standard Time over to Daylight Savings Time.

If you are running Vista, then you don't need to do anything, other than to beat your head against the wall for switching to Vista in the first place.

If you are running XPsp2 AND are getting automatic updates from Microsoft, then you, too, are automatically set. Your PC will change the time at the proper date.

For the rest of us, there's some patching to do. One option is to take your version of Windows off of automatic DST update and just change the time manually. But that's a hassle. The other really cool option is to download a small tool from Microsoft called TZEDIT.EXE and run it. You can get it here.

Once unpacked and run, this tool allows you to tweak the rules your PC uses for determining the start and stop dates for the DST switchover. There's a good help file, but here's what you do:

(1) Run the utility. Pick your time zone and select "Edit."

(2) Change the name if you want, so you will know it's been tweaked. Here in Oregon I picked "(GMT-08:00) Pacific Time (US & Canada); 2007 adjustment."

(3) For Start Day, pick "second sunday of March."

(4) For End Day, pick "first sunday of November."

(5) Reboot. That's it.

What you've done is to tell Windows to make the switch 3 weeks earlier and delay the return to standard time 1 week later. This tool supposedly works on all versions of Windows, and was especially made for all the numerous w2000 users, for whom official Microsoft support is no longer available.

EDIT: Well, I tried updating an old w98se computer, and it wouldn't run at all. So I guess the tool is good for all versions of XP and 2000.

EDIT: The version of TZedit I downloaded from Microsoft wouldn't run on the old w98se system, but lo and behold, there is a version that does! It's on the w98se installation CD, under tools\reskit\config.


TheHappyFriar wrote on 3/4/2007, 7:14 PM
thank you thank you thank you thank you

I just went searching on MS's website for something like this and there was NOTHING. Now I can get the other two comps in my house all up to date. :)
riredale wrote on 3/4/2007, 7:52 PM
I guess when you're the size of Microsoft, the left hand usually doesn't know what the right hand is doing.

If you are fully XPsp2 compliant then I guess there's an official download that takes care of this DST issue. But I, for one, have refused to go any further than sp1, and was trying to find SOMETHING on the Internet that would take care of this issue in a neat way. I stumbled on the Microsoft utility on an IBM website, of all places.
stepfour wrote on 3/4/2007, 11:18 PM
Thanks for that. I just downloaded and tweaked that on my W2K box. Nice little utility.
TheHappyFriar wrote on 3/5/2007, 6:58 AM
Honestly, I do NOT see what good is a policy of "we don't update Win2K anymore" but they release free patch-tools instead. :?

How long ago was the Govt. planning on changing DST? Perhaps it was BEFORE MS dropped Win2K support & they thought they would get sued or something for purposefully NOT updating the OS when they knew years in advance of this?
Former user wrote on 3/5/2007, 7:33 AM
I believe the decision to change DST was passed in 2005.
Dave T2
baysidebas wrote on 3/6/2007, 8:57 AM
And TZEdit.exe is dated 1999!
JJKizak wrote on 3/6/2007, 9:46 AM
I do get updates on my Win2k regularly and wonder why they wouldn't supply the update for it automatically?
ArthurDent wrote on 3/6/2007, 9:17 PM
You can find patches for older versions of Windows here:

Intelliadmin DST patches

Scroll down to "Freeware downloads" and you'll find a patch for WinNT and 2k, and another patch for Win98 and ME.

I've tried both patches and they work. I even tried the 98 patch on a Win95 PC and it works!