diff --git a/core-java-modules/core-java-date-operations-3/src/main/java/com/baeldung/date/DayOfTheWeek.java b/core-java-modules/core-java-date-operations-3/src/main/java/com/baeldung/date/DayOfTheWeek.java
new file mode 100644
index 0000000000..a5622038ce
--- /dev/null
+++ b/core-java-modules/core-java-date-operations-3/src/main/java/com/baeldung/date/DayOfTheWeek.java
@@ -0,0 +1,41 @@
+package com.baeldung.date;
+
+import java.time.DayOfWeek;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.temporal.TemporalAdjusters;
+import java.time.temporal.TemporalField;
+import java.time.temporal.WeekFields;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Locale;
+
+public class DayOfTheWeek {
+
+    public LocalDate getDateOfFirstDayOfTheWeek_UsingLocale(LocalDate localDate, Locale locale){
+        TemporalField fieldISO = WeekFields.of(locale).dayOfWeek();
+        return localDate.with(fieldISO, 1);
+    }
+
+    public LocalDate getDateOfFirstDayOfTheWeek_UsingISODayOfWeek(LocalDate localDate){
+        TemporalField dayOfWeek = WeekFields.ISO.dayOfWeek();
+        return localDate.with(dayOfWeek, dayOfWeek.range().getMinimum());
+    }
+
+    public LocalDate getDateOfFirstDayOfTheWeek_UsingDayOfWeek(LocalDate localDate){
+        DayOfWeek weekStart = DayOfWeek.MONDAY;
+        return localDate.with(TemporalAdjusters.previousOrSame(weekStart));
+    }
+
+    public LocalDate getDateOfFirstDayOfTheWeek_UsingCalendar(LocalDate localDate){
+        Calendar calendar = Calendar.getInstance();
+        ZoneId zoneId = ZoneId.systemDefault();
+        Date date = Date.from(localDate.atStartOfDay(zoneId).toInstant());
+        calendar.setTime(date);
+        while (calendar.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY) {
+            calendar.add(Calendar.DATE, -1);
+        }
+       return LocalDateTime.ofInstant(calendar.toInstant(), calendar.getTimeZone().toZoneId()).toLocalDate();
+    }
+}
diff --git a/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/date/DayOfTheWeekUnitTest.java b/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/date/DayOfTheWeekUnitTest.java
new file mode 100644
index 0000000000..cdc0eb1d6b
--- /dev/null
+++ b/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/date/DayOfTheWeekUnitTest.java
@@ -0,0 +1,68 @@
+package com.baeldung.date;
+
+import java.time.LocalDate;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class DayOfTheWeekUnitTest {
+
+    DayOfTheWeek dayOfTheWeek = new DayOfTheWeek();
+
+    @Test
+    void whenInputDateIsMonday_ThenFirstDayOfWeekIsSameAsInputDay() {
+        TestData testData = new TestData(LocalDate.of(2023, 2, 20),LocalDate.of(2023,2,20) );
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingISODayOfWeek(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingCalendar(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingDayOfWeek(testData.inputDate));
+    }
+
+    @Test
+    void whenInputDateIsSunday_ThenFirstDayOfWeekIsPreviousWeekMonday() {
+        TestData testData = new TestData(LocalDate.of(2023, 2, 19), LocalDate.of(2023,2,13));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingISODayOfWeek(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingCalendar(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingDayOfWeek(testData.inputDate));
+    }
+
+    @Test
+    void whenInputDateIsNewYearMidWeek_ThenFirstDayOfWeekIsPreviousYearLastMonday() {
+        TestData testData = new TestData(LocalDate.of(2022, 1, 1), LocalDate.of(2021,12,27));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingISODayOfWeek(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingCalendar(testData.inputDate));
+        Assertions.assertEquals(testData.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingDayOfWeek(testData.inputDate));
+     }
+
+    @Test
+    void whenInputDataHasLocale_ThenFirstDayOfWeekIsMondayOrSundayInDifferentLocale() {
+        List<TestData> testData = Arrays.asList(
+                new TestData(LocalDate.of(2023, 2, 20),Locale.FRANCE,LocalDate.of(2023,2,20)),
+                new TestData(LocalDate.of(2023, 2, 19),Locale.FRANCE,LocalDate.of(2023,2,13)),
+                new TestData(LocalDate.of(2022, 1, 1),Locale.FRANCE,LocalDate.of(2021,12,27)),
+                // day of week starts from sunday in USA
+                new TestData(LocalDate.of(2023, 2, 20),Locale.US,LocalDate.of(2023,2,19)),
+                new TestData(LocalDate.of(2023, 2, 19),Locale.US,LocalDate.of(2023,2,19)),
+                new TestData(LocalDate.of(2022, 1, 1),Locale.US,LocalDate.of(2021,12,26))
+        );
+        testData.forEach(data -> Assertions.assertEquals(data.expectedOutput, dayOfTheWeek.getDateOfFirstDayOfTheWeek_UsingLocale(data.inputDate,data.inputLocale)));
+    }
+
+    private static class TestData{
+        private final LocalDate inputDate;
+        private Locale inputLocale;
+        private final LocalDate expectedOutput;
+
+        private TestData(LocalDate inputDate, LocalDate expectedOutput){
+            this.inputDate = inputDate;
+            this.expectedOutput = expectedOutput;
+        }
+
+        private TestData(LocalDate inputDate, Locale inputLocale, LocalDate expectedOutput){
+            this.inputDate = inputDate;
+            this.inputLocale = inputLocale;
+            this.expectedOutput = expectedOutput;
+        }
+    }
+}
\ No newline at end of file