diff --git a/calendar/src/main/java/com/ldf/calendar/Utils.java b/calendar/src/main/java/com/ldf/calendar/Utils.java
index 683b290..96156f2 100755
--- a/calendar/src/main/java/com/ldf/calendar/Utils.java
+++ b/calendar/src/main/java/com/ldf/calendar/Utils.java
@@ -84,7 +84,7 @@ public static int getFirstDayWeekPosition(int year, int month, CalendarAttr.Week
         Calendar cal = Calendar.getInstance();
         cal.setTime(getDateFromString(year, month));
         int week_index = cal.get(Calendar.DAY_OF_WEEK) - 1;
-        if (type == CalendarAttr.WeekArrayType.Sunday) {
+        if (type == CalendarAttr.WeekArrayType.Monday) {
             return week_index;
         } else {
             week_index = cal.get(Calendar.DAY_OF_WEEK) + 5;
diff --git a/calendar/src/main/java/com/ldf/calendar/component/CalendarRenderer.java b/calendar/src/main/java/com/ldf/calendar/component/CalendarRenderer.java
index 97a8928..6177e55 100644
--- a/calendar/src/main/java/com/ldf/calendar/component/CalendarRenderer.java
+++ b/calendar/src/main/java/com/ldf/calendar/component/CalendarRenderer.java
@@ -96,7 +96,7 @@ public void onClickDate(int col, int row) {
      */
     public void updateWeek(int rowIndex) {
         CalendarDate currentWeekLastDay;
-        if (attr.getWeekArrayType() == CalendarAttr.WeekArrayType.Sunday) {
+        if (attr.getWeekArrayType() == CalendarAttr.WeekArrayType.Monday) {
             currentWeekLastDay = Utils.getSaturday(seedDate);
         } else {
             currentWeekLastDay = Utils.getSunday(seedDate);
diff --git a/calendar/src/main/java/com/ldf/calendar/component/CalendarViewAdapter.java b/calendar/src/main/java/com/ldf/calendar/component/CalendarViewAdapter.java
index dc9cf91..eb91a87 100755
--- a/calendar/src/main/java/com/ldf/calendar/component/CalendarViewAdapter.java
+++ b/calendar/src/main/java/com/ldf/calendar/component/CalendarViewAdapter.java
@@ -92,7 +92,7 @@ public Object instantiateItem(ViewGroup container, int position) {
             calendar.showDate(current);
         } else {
             CalendarDate current = seedDate.modifyWeek(position - MonthPager.CURRENT_DAY_INDEX);
-            if (weekArrayType == CalendarAttr.WeekArrayType.Sunday) {
+            if (weekArrayType == CalendarAttr.WeekArrayType.Monday) {
                 calendar.showDate(Utils.getSaturday(current));
             } else {
                 calendar.showDate(Utils.getSunday(current));
@@ -208,7 +208,7 @@ public void switchToWeek(int rowIndex) {
             Calendar v2 = calendars.get((currentPosition - 1) % 3);
             v2.switchCalendarType(CalendarAttr.CalendarType.WEEK);
             CalendarDate last = seedDate.modifyWeek(-1);
-            if (weekArrayType == CalendarAttr.WeekArrayType.Sunday) {
+            if (weekArrayType == CalendarAttr.WeekArrayType.Monday) {
                 v2.showDate(Utils.getSaturday(last));
             } else {
                 v2.showDate(Utils.getSunday(last));
@@ -218,7 +218,7 @@ public void switchToWeek(int rowIndex) {
             Calendar v3 = calendars.get((currentPosition + 1) % 3);
             v3.switchCalendarType(CalendarAttr.CalendarType.WEEK);
             CalendarDate next = seedDate.modifyWeek(1);
-            if (weekArrayType == CalendarAttr.WeekArrayType.Sunday) {
+            if (weekArrayType == CalendarAttr.WeekArrayType.Monday) {
                 v3.showDate(Utils.getSaturday(next));
             } else {
                 v3.showDate(Utils.getSunday(next));
@@ -251,7 +251,7 @@ private void refreshCalendar() {
 
             Calendar v2 = calendars.get((currentPosition - 1) % 3);
             CalendarDate last = seedDate.modifyWeek(-1);
-            if (weekArrayType == CalendarAttr.WeekArrayType.Sunday) {
+            if (weekArrayType == CalendarAttr.WeekArrayType.Monday) {
                 v2.showDate(Utils.getSaturday(last));
             } else {
                 v2.showDate(Utils.getSunday(last));
@@ -260,7 +260,7 @@ private void refreshCalendar() {
 
             Calendar v3 = calendars.get((currentPosition + 1) % 3);
             CalendarDate next = seedDate.modifyWeek(1);
-            if (weekArrayType == CalendarAttr.WeekArrayType.Sunday) {
+            if (weekArrayType == CalendarAttr.WeekArrayType.Monday) {
                 v3.showDate(Utils.getSaturday(next));
             } else {
                 v3.showDate(Utils.getSunday(next));
diff --git a/example/src/main/java/com/hqyxjy/ldf/supercalendar/SyllabusActivity.java b/example/src/main/java/com/hqyxjy/ldf/supercalendar/SyllabusActivity.java
index ca2ec5d..ea31956 100644
--- a/example/src/main/java/com/hqyxjy/ldf/supercalendar/SyllabusActivity.java
+++ b/example/src/main/java/com/hqyxjy/ldf/supercalendar/SyllabusActivity.java
@@ -12,7 +12,6 @@
 import android.util.Log;
 import android.view.View;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import com.ldf.calendar.Utils;
 import com.ldf.calendar.component.CalendarAttr;
@@ -183,8 +182,8 @@ public void onCalendarTypeChanged(CalendarAttr.CalendarType type) {
      */
     private void initMarkData() {
         HashMap<String, String> markData = new HashMap<>();
-        markData.put("2017-8-9", "1");
-        markData.put("2017-7-9", "0");
+        markData.put("2018-3-3", "1");
+        markData.put("2018-3-2", "0");
         markData.put("2017-6-9", "1");
         markData.put("2017-6-10", "0");
         calendarAdapter.setMarkData(markData);