Hi Chris,

Just wondering what the benefit of myDateAndTime asDate holding the
timezone information is used for.  Do you report dates based on Timezone
from the saved date?  That is the only real benefit I can think of because
without the actual time you don't know if the date is wrong for any
particular context.  I'm just interested to know how the offset might be
used.

Thanks!

All the best,

Ron Teitelbaum

On Thu, Sep 5, 2019 at 4:56 PM Chris Muller <asqueaker at gmail.com> wrote:

> Hi Sean,
>
> No.  The recent UTCDateAndTime format change to Squeak made no difference
> in this regard.  The example you gave had already been fixed previously by
> the introduction of #defaultOffset back in 2012.  Dates created in
> non-TZ-specific contexts all get a defaultOffset of 0:00.
>
> So, in your example, '1/1/1901' asDate has no time-specific information,
> so it would inherit the defaultOffset (0:00), which compares favorably to
> other Dates with the same offset.  Only Dates which were created via:
>
>      myDateAndTime asDate
>
> would inherit the timezone from myDateAndTime, and therefore represent a
> different period of time than the ones that began at offset 0:00.
>
>  - Chris
>
>
>
> On Wed, Sep 4, 2019 at 11:52 AM Sean P. DeNigris <sean at clipperadams.com>
> wrote:
>
>> Did the recent changes to Squeak's Date/Time handling (or any 3rd party
>> lib)
>> ever solve the following longstanding Chronology bug:
>>
> >Consider this thought experiment:
>> > At 11:59pm before DST changes, eval aDate := '1/1/1901' asDate.
>> > Now, wait two minutes and at 12:01am eval self assert: '1/1/1901'
>> asDate =
>> > aDate and… whammo, an exception!
>> > The "different" offsets render equal dates unequal depending on when the
>> > objects were created.
>> > The fact that the offset is the one active at object creation is the key
>> > error, because it should be the offset active when the date occurred.
>>
>>
>>
>> -----
>> Cheers,
>> Sean
>> --
>> Sent from: http://forum.world.st/Squeak-Dev-f45488.html
>>
>>
>
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