UNIX for Advanced & Expert Users

We have an ancient Unix box from Siemens. Every year the system automatically changes the time for EST or DST. Unfortunately since the box is so old the dates that the times change are the old dates and not the current ones set during (I think) the Bush years.

When I have to set the time back an hour I always reboot for fear that a system file with a timestamp an hour in the future might cause a problem. However since the system does this on it's own every year I know that I should be able to do it without having to make a trip into the office to reboot. I can access the system from home but cannot reboot remotely. It is intentionally not set to come all the way up to multi user mode on reboot so it has to be done in person.

I cannot find a script or cron job that handles this time change. The OS is DC/OSx flavor AT&T.

Is there a script that makes this change or is it embedded in the OS?

What do you have in the file /etc/TIMEZONE ?

possibly a script tz to change the dates?

you can probly make you own timezone patch.

a number of unix versions have a official patch but you can often roll your own.....

source files can be found on the internet at Sources for Time Zone and Daylight Saving Time Data

you will need to find your timezone source files.
try /usr/share/lib/zoneinfo/src/

once you have found the location then update the timezone file for the zone your in and then run it through zic, and reboot system

# zic /usr/share/lib/zoneinfo/src/<zonefile of choice>
# reboot