Use ISO week date numbering for english too#112801
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thecoop wants to merge 1 commit intoelastic:mainfrom
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Use ISO week date numbering for english too#112801thecoop wants to merge 1 commit intoelastic:mainfrom
thecoop wants to merge 1 commit intoelastic:mainfrom
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thecoop
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:Core/Infra/Core
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Pinging @elastic/es-core-infra (Team:Core/Infra) |
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English and Root use different week numbering schemes? Is either of them compliant with ISO week numbering? |
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They are both first-week-sunday, 1 day minimum week, on compat and cldr. But we override it for compat root, which is where this discrepancy comes in. There are also other changes in other locales between compat and cldr. |
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We're going to remove the Iso implementation instead |
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TL;DR - dates are really, really complicated. Reference - https://en.wikipedia.org/wiki/ISO_week_date
With the changes to defaulting the locale to english rather than root (#112796, #112799), the Iso override added by #48209 no longer applies to english, which results in broken tests as the week numbering changes between the two locales. This PR fixes the immediate problem.
However, this opens up a rather large can of worms - what about all the other locales people use? I don't believe we have any defined behaviour around this, so what is the correct thing to do long-term, and do we want to break week numbering too? Do we just revert to whatever CLDR does, with the corresponding break here too?
This is not a straightforward change - there may be users explicitly using
enlocale with non-iso week dates that will be broken by this PR.