Week algorithm should take `minDays` into account

[zbraniecki]

Currently, week calculations as presented here: https://html.spec.whatwg.org/multipage/infrastructure.html#weeks assume first week is calculated the same way for all locales.

CLDR and ICU have special data item called minDays and a method called getMinimalDaysInFirstWeek to make the calendar week calculations match the common patterns for a given locale.

Most userland date/time libraies (like, jquery's globalization and calendar) use that and it seems like a bug that W3C spec doesn't.

[0] https://github.com/unicode-cldr/cldr-core/blob/master/supplemental/weekData.json#L9
[1] http://icu-project.org/apiref/icu4c/classicu_1_1Calendar.html#a8b667a3b107b4269d57fdd58e76f37c1
[2] https://github.com/jquery/globalize/blob/master/src/date/format.js#L123

[annevk]

No, it should not take that into account. The week submitted to the server and used in the backend needs to be the same, always. What is presented in the UI can take that kind of thing into account, but that is not what this is about.

[zbraniecki]

So, how will that work? If we display first week as "Sat, Sun" (because minDays=2 for a given locale) and then second week from Mon till Sun, and the user marks Week 2, should we send "Week 1" or "Week 2" to the server?

From what you're saying, we should send "Week 1", and if the user will mark "Week 1", we should send the last week of the previous year.
Am I interpreting your words correctly?

[annevk]

That's the current setup, yes. (For all inputs by the way.)

[zbraniecki]

Thanks, closing this issue as invalid.