Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #94811

Convert between timezones (was: How to re-write this bash script in Python?)

Cross-posted to 2 groups.

Followups directed to: comp.unix.shell

Show all headers | View raw

[X-Post & F'up2 comp.unix.shell]

Chris Angelico wrote:

> On Fri, Jul 31, 2015 at 6:15 PM, Cameron Simpson <cs@zip.com.au> wrote:
>> Actually, bash has no timezone support but the date command _does_, and
>> probably neither better nor worse than Python. All one has to do is set
>> the TZ environment variable, eg (untested):
>>
>>  _year_gmt=$( TZ=GMT date +%Y )
> 
> That's assuming that it's converting against the current system
> timezone. I don't know how you'd use `date` to convert between two
> arbitrary timezones. […]

With POSIX date(1), ISTM all you could do is set the system time and for an 
additional invocation the TZ variable accordingly for output.

<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/date.html>

With GNU date(1):

$ (tz_source="Asia/Dubai"; time_source="$(LC_TIME=C TZ=$tz_source date -d 
"today 00:00 UTC+4" -Im)"; tz_target="America/Chicago"; echo "When it was 
$time_source in $tz_source, it was $(LC_TIME=C TZ=$tz_target date -d 
"$time_source") in $tz_target.")
When it was 2015-07-31T00:00+0400 in Asia/Dubai, it was Thu Jul 30 15:00:00 
CDT 2015 in America/Chicago.

$ date --version
date (GNU coreutils) 8.23
[…]

:)

-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: How to re-write this bash script in Python? Chris Angelico <rosuav@gmail.com> - 2015-07-31 18:26 +1000
  Convert between timezones (was: How to re-write this bash script in Python?) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-07-31 12:35 +0200
    Re: Convert between timezones Akira Li <4kir4.1i@gmail.com> - 2015-08-01 03:39 +0300

csiph-web