Converting to Arabic Language giving wrong Days in Calendar

I am using Example # 2 from Sample, in English language it is giving me correct Days of the Calendar like 1st Jan 2021 is Friday, but if I am changing device Language to Arabic, it is giving me wrong Dates like: 1st Jan 2021 on Saturday. I am using daysOfWeekFromLocale() from Ext for week days and changing my Preferred start of week as Sunday also,

fun daysOfWeekFromLocale(): Array<DayOfWeek> {
    val firstDayOfWeek = WeekFields.of(Locale.getDefault()).firstDayOfWeek
    var daysOfWeek = DayOfWeek.values()
    // Order `daysOfWeek` array so that firstDayOfWeek is at index 0.
    // Only necessary if firstDayOfWeek != DayOfWeek.MONDAY which has ordinal 0.
    if (firstDayOfWeek != DayOfWeek.SUNDAY) {
        val rhs = daysOfWeek.sliceArray(firstDayOfWeek.ordinal..daysOfWeek.indices.last)
        val lhs = daysOfWeek.sliceArray(0 until firstDayOfWeek.ordinal)
        daysOfWeek = rhs + lhs
    }
    return daysOfWeek
}

For reference you can see screenshots from English Language and also from Arabic. Both are from Sample Code Example # 2.

ENGLISH ONE (1st Jan 2021 is Friday)

ARABIC ONE (1st Jan 2021 on Saturday)

[usmankhan1990]

Really thank you @kizitonwose . This solution works like a charm. I also did same.

[kizitonwose]

To ensure that the calendar always starts from Sunday, you need to do two things:

When setting up the headers, do NOT use this:

~val daysOfWeek = daysOfWeekFromLocale()~

Use this instead:

val daysOfWeek = arrayOf(
    DayOfWeek.SUNDAY,
    DayOfWeek.MONDAY,
    DayOfWeek.TUESDAY,
    DayOfWeek.WEDNESDAY,
    DayOfWeek.THURSDAY,
    DayOfWeek.FRIDAY,
    DayOfWeek.SATURDAY
)

Then setup the calendarView like this: calendarView.setup(startMonth, endMonth, DayOfWeek.SUNDAY)