[Numpy-discussion] Making datetime64 timezone naive

[Alexander Belopolsky]

On Mon, Oct 19, 2015 at 3:34 PM, Chris Barker <chris.barker at noaa.gov> wrote:

>
> > In Python 3.6, datetime.now() will return different values in the first
> and the second repeated hour in the "fall-back fold." > If you allow
> datetime.datetime to numpy.datetime64 conversion, you should decide what
> you do with that difference.
>
> Indeed. Though will that only occur with timezones that have DST? I know
> I'd be fine with NOT being able to create a numpy datetime64 from a
> non-naive datetime object.
>

datetime.now() returns *naive*  datetime objects unless you supply the
timezone.  In Python 3.6 *naive* datetime objects will have the fold
attribute and datetime.now()  will occasionally return fold=1 values unless
your system timezone has a fixed UTC offset.
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