[wp-trac] [WordPress Trac] #44985: timezone_string should be valid when offset time zone mode is used

[WordPress Trac]

#44985: timezone_string should be valid when offset time zone mode is used
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 Reporter:  Rarst                         |       Owner:  (none)
     Type:  enhancement                   |      Status:  new
 Priority:  normal                        |   Milestone:  Awaiting Review
Component:  Date/Time                     |     Version:  trunk
 Severity:  normal                        |  Resolution:
 Keywords:  needs-patch needs-unit-tests  |     Focuses:
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Comment (by JPry):

 @Rarst

 I've worked on this recently in a plugin with the idea of fully allowing
 for any GMT offset or timezone string. If it helps, there are a few
 challenges that you'll find with this:

 1. Not all GMT offsets map to a timezone string
 2. Some (most?) GMT offsets map to more than one timezone string
 3. Beginning with PHP 7, the timezone strings that can be determined with
 the `timezone_name_from_abbr()` and `timezone_abbreviations_list()`
 functions has changed. You'll get different results for PHP < 7.0 and PHP
 >= 7.0.

 Hopefully that helps save you a few headaches. 🙂

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Ticket URL: <https://core.trac.wordpress.org/ticket/44985#comment:2>
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