On 3/07/2014 11:57 PM, Jerry Wu wrote:
Mike,
Sorry for the late reply.
Your explanation about "time is constant" makes sense to me. But I still
didn't know what to do with time setting following the tutorial.
One day I'll do some experiments and *really* understand how it works.
My variables are:
TIME_ZONE = 'Australia/Melbourne'
- time stored in the database eg., "2014-06-30 22:46:29.037+10" which in
June is AEST - Australian Eastern Standard Time or in March "2014-03-05
13:48:15.164+11" is daylight saving time.
- USE_TZ = True
When I find the courage I will try setting TIME_ZONE = 'UTC' and see how
times are displayed. New ones and existing ones! Maybe I'll do it around
the next changeover to daylight saving in Melbourne.
Cheers
Mike
Anyway, I chose to use Asia/Shanghai instead of fashion code.
So far so good.
Thank you very much.
On Thursday, June 26, 2014 4:48:44 AM UTC+8, Mike Dewhirst wrote:
Jerry
I just figured it out and it is simple. Time is constant and all you
need to do is decide how* you want to display it. The TIME_ZONE
setting tells the server.
An event happens at the same time everywhere in the universe (there
may be Einsteinian exceptions to this) and you can store that time
in the database relative to UTC. If you choose Shanghai time in
settings then all recorded times are stored/displayed as Shanghai
time. That is totally fair. People elsewhere just need to know the
system is runing on "Shanghai time"
I don't know why it was necessary to switch the Django default to
UTC except that lots of people use and can think in UTC as well as
local time. The entire aviation industry for example. There may be a
tiny performance gain avoiding calculating a local time.
The backwards compatibility thing is vital because if you have
history in your database you can't just switch the base from UTC+8
to UTC without making all the stored times invalid by 8 hours.
What do you think?
Mike
On Tuesday, June 24, 2014 10:34:03 AM UTC+12, Jerry Wu wrote:
Dear every one,
I am following the tutorial
<https://docs.djangoproject.com/en/1.6/intro/tutorial01/> and
meet with some problem with Time Zone part. Since I am in
Shanghai, China (UTC+8) , I think it is necessary to reset the
time part.
Below is what I tried but failed with valuerror incorrect
timezone setting:
TIME_ZONE="UTC+8"
TIME_ZONE="UTC+8:00"
I have tried "Asia/Shanghai", it works, but I think it is kind
of out-of-date style due to the description
<https://docs.djangoproject.com/en/1.6/ref/settings/#std:setting-TIME_ZONE>
in the tutorial.
Could some one give me a hint?
Thans in advance.
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