Re: [CentOS] Timezone and date

[Brian Mathis]

On Wed, Apr 5, 2017 at 1:47 PM, Richard 
wrote:

>
> > Date: Wednesday, April 05, 2017 13:15:19 -0400
> > From: Brian Mathis 
> >
> > On Tue, Apr 4, 2017 at 9:22 PM, Jerry Geis 
> > wrote:
> >
> >> When I do the date +%Z I get the timezone. Which currently is EDT.
> >>
> >> I am sending information to another system, that says EDT is not a
> >> valid timezone. I have no way to modify the other system.
> >>
> >> My question is - is there a way to get the non-day-lite savings
> >> time zone ? For example EST is valid - EDT is not.
> >>
> >> Just curious if there is an easy way already present to get a
> >> standard time zone.
> >>
> >> Thanks, - I know weird situation the other end not supported EDT.
> >>
> >> Jerry
> >
> > Communication of time values should use UTC, not a specific time
> > zone, unless the remote side needs to know the time zone for a
> > specific reason.
> >
> > To get the time in a different zone, use the TZ environment var:
> > TZ=UTC date
> >
> > ~ Brian Mathis
> > @orev
>
> Or, if for some reason you want to pass the timezone, use the GMT
> offset (e.g., -0400) rather than the three-letter abbreviations that,
> as noted earlier, aren't unique.
>
> A better description of the context for this might also result in
> more focused responses.
>


It may not be what you want if you need to know the actual time zone for
some reason.  Different places switch to Daylight Saving or Summer time on
different schedules, and you might also need to know if that location was
actually in DST at the time.  Using just the offset does not convey that
information.

I agree that more context is needed.


~ Brian Mathis
@orev
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[James B. Byrne]

On Tue, April 4, 2017 21:22, Jerry Geis wrote:
> When I do the date +%Z I get the timezone. Which currently is EDT.
>
> I am sending information to another system, that says EDT is not a
> valid
> timezone. I have no way to modify the other system.
>
> My question is - is there a way to get the non-day-lite savings time
> zone ?
> For example EST is valid - EDT is not.
>

date -u
Wed Apr  5 20:18:45 UTC 2017

-- 
***  e-Mail is NOT a SECURE channel  ***
Do NOT transmit sensitive data via e-Mail
 Do NOT open attachments nor follow links sent by e-Mail

James B. Byrnemailto:byrn...@harte-lyne.ca
Harte & Lyne Limited  http://www.harte-lyne.ca
9 Brockley Drive  vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada  L8E 3C3

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[Richard]

> Date: Wednesday, April 05, 2017 13:15:19 -0400
> From: Brian Mathis 
>
> On Tue, Apr 4, 2017 at 9:22 PM, Jerry Geis 
> wrote:
> 
>> When I do the date +%Z I get the timezone. Which currently is EDT.
>> 
>> I am sending information to another system, that says EDT is not a
>> valid timezone. I have no way to modify the other system.
>> 
>> My question is - is there a way to get the non-day-lite savings
>> time zone ? For example EST is valid - EDT is not.
>> 
>> Just curious if there is an easy way already present to get a
>> standard time zone.
>> 
>> Thanks, - I know weird situation the other end not supported EDT.
>> 
>> Jerry
>> 
> 
> 
> Communication of time values should use UTC, not a specific time
> zone, unless the remote side needs to know the time zone for a
> specific reason.
> 
> To get the time in a different zone, use the TZ environment var:
> TZ=UTC date
> 
> 
> ~ Brian Mathis
> @orev

Or, if for some reason you want to pass the timezone, use the GMT
offset (e.g., -0400) rather than the three-letter abbreviations that,
as noted earlier, aren't unique.

A better description of the context for this might also result in
more focused responses.


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[Brian Mathis]

On Tue, Apr 4, 2017 at 9:22 PM, Jerry Geis  wrote:

> When I do the date +%Z I get the timezone. Which currently is EDT.
>
> I am sending information to another system, that says EDT is not a valid
> timezone. I have no way to modify the other system.
>
> My question is - is there a way to get the non-day-lite savings time zone ?
> For example EST is valid - EDT is not.
>
> Just curious if there is an easy way already present to get a standard time
> zone.
>
> Thanks, - I know weird situation the other end not supported EDT.
>
> Jerry
>


Communication of time values should use UTC, not a specific time zone,
unless the remote side needs to know the time zone for a specific reason.

To get the time in a different zone, use the TZ environment var:
TZ=UTC date


~ Brian Mathis
@orev
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[ken]

On 04/04/2017 10:57 PM, ken wrote:

On 04/04/2017 09:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time 
zone ?

For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a 
standard time

zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos



"man date" shows a few options:


   %z +hhmm numeric time zone (e.g., -0400)

   %:z+hh:mm numeric time zone (e.g., -04:00)

   %::z   +hh:mm:ss numeric time zone (e.g., -04:00:00)

   %:::z  numeric  time  zone  with  :  to  necessary precision 
(e.g., -04,

  +05:30)

   %Z alphabetic time zone abbreviation (e.g., EDT)


That is, perhaps the "other system" wants some kind of numeric 
representation.  Without knowing the recipient app on that other 
system, this is just a guess.


EST5EDT

"man timezone" might also be inspiring.


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[John R Pierce]

On 4/4/2017 7:51 PM, John R Pierce wrote:

On 4/4/2017 6:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time 
zone ?

For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a 
standard time

zone.

Thanks, - I know weird situation the other end not supported EDT.



# cat /etc/timezone
America/Los_Angeles 


oops, sent too soon.   thats the canonical time zone.   things like CST, 
they aren't globally reliable, in China, CST is China Standard Time, 
while in the USA its Central Standard Time. OOOPS.   there's a bunch 
more such conflicts in 3-letter timezones around the world, they had 
best be avoided.



--
john r pierce, recycling bits in santa cruz

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[ken]

On 04/04/2017 09:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos



"man date" shows a few options:


   %z +hhmm numeric time zone (e.g., -0400)

   %:z+hh:mm numeric time zone (e.g., -04:00)

   %::z   +hh:mm:ss numeric time zone (e.g., -04:00:00)

   %:::z  numeric  time  zone  with  :  to  necessary precision 
(e.g., -04,

  +05:30)

   %Z alphabetic time zone abbreviation (e.g., EDT)


That is, perhaps the "other system" wants some kind of numeric 
representation.  Without knowing the recipient app on that other system, 
this is just a guess.


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[John R Pierce]

On 4/4/2017 6:22 PM, Jerry Geis wrote:

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.



# cat /etc/timezone
America/Los_Angeles


--
john r pierce, recycling bits in santa cruz

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Timezone and date

[Steven Tardy]

> On Apr 4, 2017, at 9:22 PM, Jerry Geis  wrote:
> 
> sending information to another system

What does this mean? Syslog?
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

[CentOS] Timezone and date

[Jerry Geis]

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time
zone.

Thanks, - I know weird situation the other end not supported EDT.


Jerry
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos