Issue 5919 in pharo: DateAndTime instance creation and offsets

Status: Accepted
Owner: ----
Labels: Milestone-2.0 Type-Bug

New issue 5919 by [hidden email]: DateAndTime instance creation and  
offsets
http://code.google.com/p/pharo/issues/detail?id=5919

DateAndTime class>>fromSeconds: tacks on an offset, but one has no idea  
what the local time zone was when the date was converted to seconds. The  
only safe way to do this is to assume that the argument is relative to a  
known constant, like the Unix epoch. Even SqueakEpoch does not work because  
the offset is not specified. Then, fromSeconds: can return the localOffset,  
*but* by doing an #asLocal on the result, *not* by simply pretending that  
the result was in the same timezone.

See the discussion at  
http://forum.world.st/Bug-in-DateAndTime-td2293749.html


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Comment #1 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

We should do the following:
- DateAndTime internally uses only UTC times
- offset changes only the timezone
- asSeconds returns seconds in UTC
- fromSeconds takes seconds in UTC and creates a DateAndTime in local time


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Updates:
        Cc: [hidden email]

Comment #2 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

(No comment was entered for this change.)


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Updates:
        Blockedon: pharo:6332

Comment #3 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

(No comment was entered for this change.)


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Issue 5919: DateAndTime instance creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

This issue is now blocking issue pharo:6327.
See http://code.google.com/p/pharo/issues/detail?id=6327

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Issue 5919: DateAndTime instance creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

This issue is now blocking issue pharo:6336.
See http://code.google.com/p/pharo/issues/detail?id=6336

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Issue 5919: DateAndTime instance creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

This issue is no longer blocking issue pharo:6336.
See http://code.google.com/p/pharo/issues/detail?id=6336
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        Status: FixReviewNeeded
        Cc: [hidden email]

Comment #7 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

slice in inbox


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Comment #8 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

Handcrafted ChangeSet attached which will do the proper transformations

Attachments:
        DateAndTimeUTC.cs  41.2 KB


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Updates:
        Status: Integrated

Comment #9 on issue 5919 by [hidden email]: DateAndTime instance  
creation and offsets
http://code.google.com/p/pharo/issues/detail?id=5919

in 2.0 2021


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