[pickers] Day of the week title (PickersCalendarDayHeader) is forced to truncate to the first char

[rajdee]

Current behavior 😯

The titles of the days of the week in the DayPicker are truncated to the first character, regardless of what the localized helper getWeekdays returns.

children: day.charAt(0).toUpperCase()

Expected behavior 🤔

I propose to add an option to disable truncating of days titles or the ability to pass a custom PickersCalendarDayHeader component

[DanailH]

Hi, @rajdee thanks for raising this. This seems like a relevant request. I'm tagging @flaviendelangle or @alexfauquette to take a look when they have some time.

[flaviendelangle]

Related to #5330

Duplicates #4605

[rajdee]

@flaviendelangle I agree that the ticket is similar to #5530 but #4605 has no solutions at the moment, because day.charAt(0).toUpperCase() is hardcoded

I extended the date-fns adapter with getWeekdays but that doesn't make sense because output week day is truncated. Therefore, I suggested adding an option to disable truncating or add the ability to pass a custom PickersCalendarDayHeader component

[flaviendelangle]

Therefore, I suggested adding an option to disable truncating or add the ability to pass a custom PickersCalendarDayHeader component

Which is basically what #4605 is talking about, which is why I closed this one