How to change CDT to CST

[Heik]

Hi everyone,

Does anybody know how to change the parameter Central Daylight Time (CDT) to Central Standard Time (CST)with the date command on HP-UX??

I have this:
Wed Mar 18 10:44:10 CDT 2009

but I would like to have this:
Wed Mar 18 10:44:10 CST 2009

How do i change it?

Thanks in advance...

[Dave Johnson_1]

That is controlled by the rules in the /usr/lib/tztab file to control switching between standard time and daylight savings time.
When the rules changed in the US a couple of years ago, HP released a patch to implement a new file. Once you have that installed, the CST/CDT will display correctly.
By the way, we are in CDT right now. It started on March 8th this year.

[James R. Ferguson]

Hi:

Each user can establish his/her own timezone preference in their '.profile' by setting and exporting the TZ variable. Generally this is done system-wide in '/etc/profile' when the '/etc/TIMEZONE' file is sourced.

To change your system-wide setting, edit '/etc/TIMEZONE' or run '/sbin/set_parms' passing the keyword "timezone" as its argument.

To see what your time might look like, do:

# TZ=CST6 date

Regards!

...JRF...

[Heik]

Thank you guys for you help. I am trying to set the time for Mexico Zone so this is what i did:

1. Edit /usr/lib/tztab

# Central Standard Time, Central Daylight Time
CST6CDT
0 3 24-30 4 1970-1973 0 CDT5
0 3 6 1 1974 0-6 CDT5
0 3 22-28 2 1975 0 CDT5
0 3 24-30 4 1976-1986 0 CDT5
0 3 1-7 4 1987-2038 0 CDT5 -> April
0 1 25-31 10 1970-1973 0 CST6
0 1 24-30 11 1974 0 CST6
0 1 25-31 10 1975-2038 0 CST6 -> October

2. #echo $TZ
CST6CDT

3. #date 031811282009

4. #date
Wed Mar 18 11:28:00 CST 2009

then Shazammm!!! that's what I wanted. In Mexico we change the time 2 weeks after than US or Canada.

Thanks for your help!

[Heik]

Thanks for your tremendous help!

[Dave Johnson_1]

I took a look at the tztab file and there is already a rule for Mexico City, MXST6MXDT if that helps.

[Dennis Handly]

>1. Edit /usr/lib/tztab

You should do what Dave suggested and use a special timezone for Mexico, not change the one for the US.
By editing tztab, you will not be able to patch it in the future without manual intervention.