Today in Web compat: Firefox and Safari are ahead of Chrome in ICU4C version and upsteam ICU4C changed the formatting of zero offset from GMT.
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Today in Web compat: Firefox and Safari are ahead of Chrome in ICU4C version and upsteam ICU4C changed the formatting of zero offset from GMT. This broke birthday date validation for a UK based site for birthdays before 1970 in Firefox and, on 26.x Apple OSs, in Safari, because the site performs a formatting-based check on the time zone of London on the date to be validated and the UK has changed time zone rules along the way.
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Today in Web compat: Firefox and Safari are ahead of Chrome in ICU4C version and upsteam ICU4C changed the formatting of zero offset from GMT. This broke birthday date validation for a UK based site for birthdays before 1970 in Firefox and, on 26.x Apple OSs, in Safari, because the site performs a formatting-based check on the time zone of London on the date to be validated and the UK has changed time zone rules along the way.
It turned out that some time zones that use “GMT” as their abbreviation in the same style as CET for Central European Time or PDT for Pacific Daylight-saving Time previously got “GMT” by a different mechanism, so an intentional change to that mechanism had unintended effects.
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It turned out that some time zones that use “GMT” as their abbreviation in the same style as CET for Central European Time or PDT for Pacific Daylight-saving Time previously got “GMT” by a different mechanism, so an intentional change to that mechanism had unintended effects.
The time zone and daylight-saving time fans out there will probably appreciate the user impact description that I wrote for release management:
“Users whose birthday is before the end of October 1971 on a day when the UK was not observing daylight-saving time can't sign up for online banking at a particular British bank.”
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The time zone and daylight-saving time fans out there will probably appreciate the user impact description that I wrote for release management:
“Users whose birthday is before the end of October 1971 on a day when the UK was not observing daylight-saving time can't sign up for online banking at a particular British bank.”
@hsivonen Presumably this includes everyone born on 1970-01-01?
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@hsivonen Presumably this includes everyone born on 1970-01-01?
@mkj Nope, due to the British Standard Time Act of 1968. Thanks to your toot, I realized that my fix was wrong!
(This looks like time zone satire or April Fools, but, unfortunately, I’m not joking.)
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@mkj Nope, due to the British Standard Time Act of 1968. Thanks to your toot, I realized that my fix was wrong!
(This looks like time zone satire or April Fools, but, unfortunately, I’m not joking.)
@hsivonen Uh, oh!
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R relay@relay.mycrowd.ca shared this topic
