1878483 - Input type=datetime-local does not respect macOS locale configuration

Status: RESOLVED DUPLICATE of bug 1803564

(Core :: Widget: Cocoa, defect)

Description

[jerome]

Attachment: Screen shots

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:122.0) Gecko/20100101 Firefox/122.0

Steps to reproduce:

I'm using Firefox 122
I'm using macOS 14.3 (23D56)
My locale on the OS is language: english, region: France, first day of week: monday, date format: dd/mm/yyyy
Firefox's language settings is: English (GB), English (US), French
Firefox's web page language settings is: English (UK) [en-gb], English [en]

I'm navigating to any website with an <input type=datetime-local> and I see the US format (mm / dd / yyyy) with 12h format and weeks starting on Sundays

Actual results:

I'm navigating to any website with an <input type=datetime-local> and I see the US format (mm / dd / yyyy) with 12h format and weeks starting on Sundays

Expected results:

I'm navigating to any website with an <input type=datetime-local> and I see the OS format as specified on the MDN documentation
Format should be ( dd / mm / yyyy) with 25h format and weeks starting on Mondays

Comment 1

[jerome]

Note that other browsers, chromium based, or webkit based, show the input type=datetime-local as espected

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.