On Fri, Aug 21, 2015 at 8:07 AM, Stuart Bishop <[email protected]>
wrote:

> - The rules in PEP-495 for utcoffset() and dst() to deal with
> ambiguous times only work in simple cases, as there dst offsets both
> more and less than 1 hour, and there is no stdoffset since the offset
> can change at the same time (eg. Europe/Vilnius 1941, where the clocks
> ended up going backwards for summer time instead of forwards).
>

Instead of engaging in a theoretical discussion, I went ahead and added
this transition as a test case to my reference implementation.  Please
review [1] and let me know if you see any issues.

[1]:
https://github.com/abalkin/cpython/commit/9f683c8d0f6f2b48aad81ae4e5e8a118a542d2d4
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