Thinking further about the DST changes, I looked to see if there was
information about PDAs. I found the following in the knowledge base for
the University of Illinois at Chicago.
By the way, I like their writing style. The author shows his love for the
obsolete HP100LX and mentions that time zones were invented in Chicago by
railroads.
/rich
http://www.uic.edu/depts/accc/systems/daylight/contents.html
[image: ACCC Home Page] <http://www.uic.edu/depts/accc/home/>
*ACADEMIC COMPUTING
and COMMUNICATIONS CENTER * [image: Accounts /
Passwords]<http://www.uic.edu/depts/accc/home/ACCTS.html> [image:
Email] <http://www.uic.edu/depts/accc/home/EMAIL.html> [image: Labs /
Classrooms] <http://www.uic.edu/depts/accc/home/FACIL.html> [image:
Telecom]<http://www.uic.edu/depts/accc/home/TELECOM.html> [image:
Network] <http://www.uic.edu/depts/accc/home/NETWORK.html> [image:
Security]<http://www.uic.edu/depts/accc/home/SECURITY.html> [image:
Software] <http://www.uic.edu/depts/accc/home/SOFTWARE.html> [image:
Computing and Network
Services]<http://www.uic.edu/depts/accc/home/SERVICES.html> [image:
Education / Teaching]
<http://www.uic.edu/depts/accc/home/EDUCATION.html> [image:
Getting Help] <http://www.uic.edu/depts/accc/home/HELP.html> *2007
Daylight Savings Time Problem* Contents
<http://www.uic.edu/depts/accc/systems/daylight/contents.html> 1. Intro and
General Information
<http://www.uic.edu/depts/accc/systems/daylight/dst2007.html> 2. Windows
<http://www.uic.edu/depts/accc/systems/daylight/windows.html> 3. Macs
<http://www.uic.edu/depts/accc/systems/daylight/mac.html> 4. Unix
<http://www.uic.edu/depts/accc/systems/daylight/unix.html> 5. PDAs 6.
Applications
<http://www.uic.edu/depts/accc/systems/daylight/applications.html> 7.
UICalendar <http://www.uic.edu/depts/accc/systems/daylight/uicalendar.html>
2007
Daylight Savings Time Changes for PDAs
In 2005, the United States congress passed the Energy Policy Act of 2005,
which among other things extended the duration of Daylight Savings Time in
United States, starting in 2007. Canada and Bermuda have followed suit.
The problem is that, during the extended periods of three weeks in the
spring and one week in the fall, many clocks on systems which automatically
to change to and from Daylight Savings Time will continue to operate on
Standard Time, even though Daylight Time is actually in effect. These
uncorrected systems will not be synchronized with other systems which have
been fixed.
This page tells you how to correct that, so that the automatic Daylight Time
changes take place on the correct date.
We have until March 11, 2007 to fix this problem in the U.S. and Canada.
- Handheld devices,
PDAs<http://www.uic.edu/depts/accc/systems/daylight/pda.html#0>
- Microsoft Windows CE and Windows
Mobile<http://www.uic.edu/depts/accc/systems/daylight/pda.html#1>
- Palm OS <http://www.uic.edu/depts/accc/systems/daylight/pda.html#2>
- HP 100LX and
200LX<http://www.uic.edu/depts/accc/systems/daylight/pda.html#3>
- See Also <http://www.uic.edu/depts/accc/systems/daylight/pda.html#4>
*Handheld devices, PDAs * Most PDAs will need updating. See your
manufacturer's Web page for details. If you cannot update its firmware, you
may need to configure it so that you can make the Daylight Time adjustments
each time manually. *Microsoft Windows CE and Windows Mobile *
Patches
are available for equipment manufacturers to incorporate into new equipment.
However, for Windows CE and Windows Mobile equipment already out in the
field, you have little choice other than to disable automatic Daylight Time
changes and change the time manually. To do that:
Windows CE Devices <http://support.microsoft.com/kb/923027>
Here is an unofficial patch: Edgeblog: Daylight Saving Time - Windows Mobile
Fix <http://www.edgeblog.net/2007/daylight-saving-time-windows-mobile-fix/>
*Palm OS * In Palm OS 5, (4 also?) edit the characteristics of
each location that matters to you in the Date & Time Preferences. Specify
whether or not that location observes Daylight Time, and also the new start
date (second Sunday of March) and end date (first Sunday of November). Don't
forget that all locations in Indiana should be changed to observe Daylight
Savings Time.
Earlier versions of Palm OS did not have a facility for automatically
changing to Daylight Savings Time.
Tips for adjusting DST on
PalmOS5.X<http://kb.palm.com/SRVS/CGI-BIN/WEBCGI.EXE?New,kb=PalmSupportKB,CASE=obj(23151),ts=Palm_External2001>
*HP 100LX and 200LX *
The Hewlett-Packard 100LX and 200LX Palmtop PCs are fully-programmable,
MS-DOS based PDAs, which despite being over a decade old remain quite
popular, with used units in good condition selling on Ebay for a premium
price. A great many of these are in daily use, with new applications still
being developed.
However, the rules for Daylight Time were different when these wonderful
little machines were made. Here is how to correct that, so that the
automatic Daylight Time changes take place on the correct date.
How to fix the 2007 Daylight Time dates
1. Using Filer, check to see if file *C:\_DAT\TIMEZONE.DAT* already
exists. If it does, then some modification has already been made. Skip to
Step 3.
2. If *C:\_DAT\TIMEZONE.DAT* does not exist, then copy file *
D:\_SYS\TIMEZONE.DAT* to *C:\_DAT\TIMEZONE.DAT*. (You cannot modify
file *D:\_SYS\TIMEZONE.DAT* directly because it is in ROM.)
3. Open the Memo program, and use it to edit file *
C:\_DAT\TIMEZONE.DAT*.
4. If you have sections besides these, leave them alone. The order of
sections is not important. The file should look something like this when you
are done editing:
European
3:25-31 6 1:00
10:25-31 6 0:00
Northern
3:8-14 6 1:00
11:1-7 6 0:00
Southern
3:1-7 6 0:00
10:25-31 6 1:00
Mexican
4:1-7 6 1:00
10:25-31 6 0:00
5. Press *F10* to Save the file and exit Memo.
6. If you previously had the World Time program running, close it.
7. Open the World Time program, find Indianapolis IN in the list of
cities, and press *ENTER*. Indiana started observing Daylight Savings
Time in 2006. For Indianapolis, change the Daylight Savings box so that
Automatic and Northern are selected, and press *F10* when done. Repeat
this for any other cities in Indiana that you have defined.
8. Change all locations in Mexico so that Automatic and Mexican are
selected.
Time Zone File FormatYou can define additional sets of Daylight Time
changing dates yourself, in file C:\_DAT\TIMEZONE.DAT. The time zone heading
must begin with a unique letter of the alphabet. This means you can only
have 26 total zones defined. For instance, since there is already
"European", you could not also have "Egyptian". It is also not a good idea
to make the name of a zone in this file exactly the same as the name of a
country - this will cause false hits when you use Find. This is why we use
the name "Mexican" instead of "Mexico".
The next two lines define when to change time. For instance, under
"Northern" above:
- 3 is for March (1=January - 12=December)
- 8-14 is the range of dates. The 2nd occurrence of a day in a month
will be between the 8th and the 14th.
- 6 is for Sunday (0=Monday, 1=Tuesday - 6=Sunday)
- 1:00 means to set the clock 1:00 ahead of usual (i.e. spring
forward)
The second line under "Northern" likewise reads, "In November, on a day
between the 1st and the 7th, which is a Sunday, change the clock to 0:00
later than usual (i.e. fall back to normal)."
Now that you know how to edit this, you can keep the HP 100LX and 200LX
updated for any future changes in Daylight Time change dates.
Links:
- HP Palmtop Paper: World Time - New European Daylight Savings
Time<http://www.palmtoppaper.com/ptphtml/26/pt260048.htm>
*See Also *
The notes under 3. General
Considerations<http://www.uic.edu/depts/accc/systems/daylight/dst2007.html#General>on
the introduction page. Various information are of interest.
------------------------------
*Did you know that Time Zones were invented here in Chicago, by the
railroads?*
