import java.time.LocalDate;
import java.time.temporal.WeekFields;
import java.util.Locale;
 
public class Main {
	public static void main(String[] args) {
		// Test
    	int weekNumber = 34;
    	int year = 2021;
 
    	System.out.println(getFirstDayOfWeek(year, weekNumber, Locale.UK));
        System.out.println(getFirstDayOfWeek(year, weekNumber, Locale.US));
	}
 
	static LocalDate getFirstDayOfWeek(int year, int weekNumber, Locale locale) {
		return LocalDate
				.of(year, 2, 1)
                .with(WeekFields.of(locale).getFirstDayOfWeek())
                .with(WeekFields.of(locale).weekOfWeekBasedYear(), weekNumber);
	}
}

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