New submission from Mirko Vogt:
I trapped into a pitfall today with web programming using DateTime.isoformat()
in the backend and Javascript on the frontend side.
isoformat() string'yfies a DateTime-object according to ISO 8601, which states
that, if no timezone is specified, the stri
Mirko Vogt added the comment:
Both implementations behave according the standard. If you assume otherwise you
violate the standard - as JavaScript does.
If that change would break software, that software was broken from the
beginning
Mirko Vogt added the comment:
Actually I'm not sure anymore whether NOT specifying a timezone is valid at all.
Even though the Spidermonkey documentation itself states, that it doesn't
behave according to the ISO standard, several documents say that specifying the
timezone is cruci
Mirko Vogt added the comment:
from datetime import *
In [4]: datetime.utcnow().isoformat()
Out[4]: '2015-01-27T18:51:18.332566'
When using utcnow() e.g. I would expect the result definitely being marked as
UTC.
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type: enhancement -
Mirko Vogt added the comment:
I never said there is no way to result in an ISO 8601 string with UTC stated
explicitly.
I showed a case where I think it is correct to assume UTC is stated ( e.g.
utcnow()), however the result of isoformat() doesn't
Mirko Vogt added the comment:
I got that - so marking utcnow() as deprecated seems like a good idea.
But it's not just about utcnow() but also now().
now() also doesn't return any timezone stated by default - which I would still
consider as a bug. However making now() require
Mirko Vogt added the comment:
Just to clarify my problem - then I'll just happily use
datetime.now(tzutc()).isoformat()
- There is datetime.now() which is supposed to be used (no utcnow() anymore)
- datetime.now() might return a naive object, when no TZ is specified
- *However* als
Mirko Vogt added the comment:
The proper response to that comment probably is: It's called ISO8601 and not
RFC8601. And unfortunately ISO stands for "International Standard".
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