$datePreferences = [
	'default',
	'ISO 8601',
];
$defaultDateFormat = 'wuu';
$dateFormats = [
	'wuu time'            => 'H:i',
	'wuu date'            => 'Y年n月j号 (D)',
	'wuu both'            => 'Y年n月j号 (D) H:i',
];

would do it.

Change 326093 had a related patch set uploaded (by MarcoAurelio):
Update date format for Wu language

https://gerrit.wikimedia.org/r/326093

gerritbot added a project: Patch-For-Review.Dec 9 2016, 10:22 AM

Change 326093 merged by jenkins-bot:
Update date format for Wu language

https://gerrit.wikimedia.org/r/326093

ReleaseTaggerBot added projects: MW-1.29-release (WMF-deploy-2017-01-03_(1.29.0-wmf.7)), MW-1.29-release-notes.Dec 20 2016, 1:00 PM

MarcoAurelio closed this task as Resolved.Dec 20 2016, 1:24 PM

MarcoAurelio claimed this task.

Tbodt mentioned this in T398734: DiscussionTools can no longer parse old talk pages if $defaultDateFormat was changed.Jul 4 2025, 6:43 PM

Maintenance_bot removed a project: Patch-For-Review.Jul 4 2025, 7:30 PM

Restricted Application added a project: User-MarcoAurelio. · View Herald TranscriptJul 4 2025, 7:30 PM

MarcoAurelio moved this task from unsorted/backlog to cabinet on the User-MarcoAurelio board.Nov 25 2025, 7:02 PM

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Change date format for Wuu
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