Commits on Mar 7, 2024

1. Resolve ambiguity for permanent timezone changes …

   `Biz::Time` already passes true as the `dst` parameter to `local_to_utc`
   to avoid the ambiguity of converting a local time that occurred twice
   due to daylight savings time.
   
   However if a local time occurs twice due to a permanent timezone change,
   the `dst` parameter doesn't help. `local_to_utc` can be given a block to
   handle this case:
   
   https://github.com/tzinfo/tzinfo/blob/v2.0.6/lib/tzinfo/timezone.rb#L613-L619
   
   > The `dst` parameter will not be able to resolve an ambiguity resulting
   > from the clocks being set back without changing from daylight savings
   > time to standard time. In this case, if a block is specified, it will
   > be called to resolve the ambiguity. The block must take a single
   > parameter - an `Array` of {TimezonePeriod}s that need to be resolved.
   > The block can select and return a single {TimezonePeriod} or return
   > `nil` or an empty `Array` to cause an {AmbiguousTime} exception to be
   > raised.

   

   eugeneius committed Mar 7, 2024
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