How to modify the “shortWeekdaySymbols” in UIDatePicker?

Here I have a UIDatePicker and set locale to "es-ES".
Code Block
_picker = [[UIDatePicker alloc]init];
_picker.datePickerMode = UIDatePickerModeDate;
_picker.frame = CGRectMake(0, 100, 300, 30);
_picker.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"es-ES"];

The "month" displays correcttly (in Spanish), but the "shortWeekdaySymbols" (SUN,MON,...) still in English.

How could I solve this issue? Is there any other way besides changing "Language&Region".

If you set datePicker Style as wheels, localization works.

In Automatic, I do not see the shortName…

May have a look here, if that may help in anyway.
https://developer.apple.com/forums/thread/118198

How to modify the “shortWeekdaySymbols” in UIDatePicker?
 
 
Q