diff --git a/src/Notes-master/src/net/micode/notes/ui/DateTimePicker.java b/src/Notes-master/src/net/micode/notes/ui/DateTimePicker.java
index d534f81..7bf9782 100644
--- a/src/Notes-master/src/net/micode/notes/ui/DateTimePicker.java
+++ b/src/Notes-master/src/net/micode/notes/ui/DateTimePicker.java
@@ -490,19 +490,20 @@ public class DateTimePicker extends FrameLayout {
         updateAmPmControl(); // 更新上午/下午选择控件
     }
     private void updateDateControl() {
-        Calendar cal = Calendar.getInstance();
-        cal.setTimeInMillis(mDate.getTimeInMillis());
-        cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);
-        mDateSpinner.setDisplayedValues(null);
+        Calendar cal = Calendar.getInstance(); // 创建一个新的Calendar对象
+        cal.setTimeInMillis(mDate.getTimeInMillis()); // 将mDate的时间设置给新的Calendar对象
+        cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1); // 将日期向前移动DAYS_IN_ALL_WEEK / 2 + 1天
+
+        mDateSpinner.setDisplayedValues(null); // 清空日期选择控件的显示值
         for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
-            cal.add(Calendar.DAY_OF_YEAR, 1);
-            mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);
+            cal.add(Calendar.DAY_OF_YEAR, 1); // 将日期加上1天
+            mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal); // 将日期格式化为"MM.dd EEEE"的字符串格式，并存储到mDateDisplayValues数组中
         }
-        mDateSpinner.setDisplayedValues(mDateDisplayValues);
-        mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
-        mDateSpinner.invalidate();
-    }
 
+        mDateSpinner.setDisplayedValues(mDateDisplayValues); // 设置日期选择控件的显示值为mDateDisplayValues数组
+        mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2); // 设置日期选择控件的当前值为DAYS_IN_ALL_WEEK / 2
+        mDateSpinner.invalidate(); // 使日期选择控件无效，以便重绘
+    }
     private void updateAmPmControl() {
         if (mIs24HourView) {
             mAmPmSpinner.setVisibility(View.GONE);