I use version 11.1.5 of the AtlasKit DatePicker. And despite the main language being English, in my app the date picker shows Sunday as the first weekday instead of Monday. So I added a datePickerProp:
<DatePicker
onChange={(date) => this.onDateChange(date)}
dateFormat={DATE_FORMAT}
value={isDisabled ? '' : date}
datePickerProps={{ weekStartDay: 1 }}
/>
But there is no change:
What’s missing? Or what is the best practice here, to also honour user settings.