We updated the DST settings on our iSeries which has carried over to Notes. However, there is one user who is still seeing everything an hour ahead. He sent me an email and while I show it arriving at 9:36am, he shows it being sent at 10:36am. I am not sure if his PC has been patched. Would that affect it? I had him check his notes.ini file and it was showing the right zone (5).
Subject: DST - One user not updated
Fixed it! Windows problem even on a machine that was patched for both Windows and Notes.
Look at the good registry key info on a machine that works and compare it to a machine that is not working. The faulty key will show the old timezone info…I manually changed the various keys to the known good machine values and much happiness ensued! 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
Subject: DST - One user not updated
Hi
Subject: Most Frequently Asked Questions into Support on 3/12/2006
Posted by Michael Alexander on 2007-03-12 at 23:10 using Lotus Notes
Category: Daylight Saving Time Release: All Releases Platform: All Platforms
Content:
The following are Frequently Asked Questions about DST 2007 presented in roughly the frequency that we receive them and the availability of a direct solution. Please review these questions in order to most efficiently resolve your problem. Additional troubleshooting guidance and Frequently Asked Questions are posted in technotes 1254813 and 1254624.
Q1. Why do meetings appear an hour early in my calendar, and how do I correct this?
A1. In most cases, meetings appearing an hour early would indicate that the operating system patch for DST 2007 has not been applied, or Notes has not been restarted since the patch was applied. Use this short checklist to determine if this is the cause of the problem in your environment.
Check your Location document to confirm that Notes will observe the operating system’s time zone settings. On the Advanced → Basics tab of your Location document, the field “Use operating system time zone” should be set to “Yes”. If it is not, correct this setting and restart Notes.
Create a new Appointment in your calendar for any date. Save that document and then review the StartTimeZone or EndTimeZone fields. If the operating system is updated, these fields will contain a value that includes “DL=3 2 1 11 1 1”. If the value does NOT include this DL rule, confirm that DO=1 (which indicates that Notes is aware that it should observe Daylight Saving Time) and that the rule “DL=4 1 1 10 -1 1” is present (indicating that the standard pre-2007 rules are being used). Then either restart Notes, if you think the operating system patch has been applied, or install the appropriate Microsoft operating system solution from their support article. See question 3 below for more information on problems with the “manual” update.
Check the DSTLaw setting in your notes.ini. If Notes and Domino are set to use the operating system time zone, this will be set for you and you do NOT need to update it manually. This setting should reflect “DSTLaw=3, 2, 1, 11, 1, 1”. If it does not, restart Notes or Domino and check again, (re)install the operating system patch or review question 3 below for information on troubleshooting problems with the “manual” update.
Q2. Why do meetings appear an hour late in my calendar, and how do I correct them?
A2. In most cases, meetings appearing an hour late would indicate that the calendar entry was created by a client prior to the operating system being updated with the new DST 2007 rules. These documents are easily identified and IBM has published agents which will correct these documents with a very high degree of accuracy. Technote 1254639 includes extensive documentation on this as well as video samples. At a very high level the agent will:
Select documents scheduled for 2007 and 2008 expanded DST periods that were created with the old rules or when the old rules were active (or operate on selected documents in the case of the “Selected Documents” version of the agents)
Update the Daylight Saving Time rules that are stored on the documents to match the 2007 rules
Alter the start time of these documents such that they will begin at the intended time
Flag these documents as updated so that subsequent agent operations can process more quickly
Subject: DST - One user not updated
I am having the same problem…all users but one (!) is fixed and this one is an hour behind.
Did you find the cause of your problem? Not much luck here so far. The client .ini indicates the patch did work but his machine still has the wrong time. I am suspecting something related to Windows at this point, but no solution yet.
- Richard