Here I have a UIDatePicker and set locale to "es-ES". _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".