Start of week for locale using Joda-Time

Question

How do you determine which day of the week is considered the “start” according to a given Locale using Joda-Time?

Point: Most countries use the international standard

Answer 1

Here is how one might work around Joda time to get the U.S. first day of the week:

DateTime getFirstDayOfWeek(DateTime other) {
  if(other.dayOfWeek.get == 7)
    return other;
  else
    return other.minusWeeks(1).withDayOfWeek(7);
}

Or in Scala

def getFirstDayOfWeek(other: DateTime) = other.dayOfWeek.get match {
    case 7 => other
    case _ => other.minusWeeks(1).withDayOfWeek(7)
}