diff --git a/res/values/cherish_arrays.xml b/res/values/cherish_arrays.xml
index c927823..a4612b2 100644
--- a/res/values/cherish_arrays.xml
+++ b/res/values/cherish_arrays.xml
@@ -233,4 +233,16 @@
         <item>5</item>
     </string-array>
    
+    <!-- AOD Schedule -->
+    <string-array name="doze_always_on_auto_mode_entries">
+        <item>@string/disabled</item>
+        <item>@string/night_display_auto_mode_twilight</item>
+        <item>@string/night_display_auto_mode_custom</item>
+    </string-array>
+
+    <string-array name="doze_always_on_auto_mode_values" translatable="false">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+    </string-array>
 </resources>
diff --git a/res/values/cherish_strings.xml b/res/values/cherish_strings.xml
index 614ce16..9a4de0d 100644
--- a/res/values/cherish_strings.xml
+++ b/res/values/cherish_strings.xml
@@ -502,4 +502,9 @@
 	<!-- Toast app icon -->
     <string name="toast_icon_title">Toast app icon</string>
     <string name="toast_icon_summary">Display the app\'s icon corresponding with the toast</string>
+	
+	<!-- AOD Schedule -->
+    <string name="always_on_display_schedule_title">Always on display schedule</string>
+    <string name="always_on_display_schedule_sunset">Sunset</string>
+    <string name="always_on_display_schedule_sunrise">Sunrise</string>
 </resources>
diff --git a/res/xml/always_on_display_schedule.xml b/res/xml/always_on_display_schedule.xml
new file mode 100644
index 0000000..3157bb4
--- /dev/null
+++ b/res/xml/always_on_display_schedule.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 Yet Another AOSP Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:title="@string/always_on_display_schedule_title"
+    xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">
+
+    <com.cherish.settings.preferences.SecureSettingListPreference
+        android:key="doze_always_on_auto_mode"
+        android:title="@string/night_display_auto_mode_title"
+        android:dialogTitle="@string/night_display_auto_mode_title"
+        android:entries="@array/doze_always_on_auto_mode_entries"
+        android:entryValues="@array/doze_always_on_auto_mode_values"
+        android:persistent="false" />
+
+    <Preference
+        android:key="doze_always_on_auto_since"
+        android:title="@string/night_display_start_time_title" />
+
+    <Preference
+        android:key="doze_always_on_auto_till"
+        android:title="@string/night_display_end_time_title" />
+
+</PreferenceScreen>
diff --git a/res/xml/cherish_settings_lockscreen.xml b/res/xml/cherish_settings_lockscreen.xml
index 433e512..64b82f9 100644
--- a/res/xml/cherish_settings_lockscreen.xml
+++ b/res/xml/cherish_settings_lockscreen.xml
@@ -41,6 +41,10 @@
 			
 	</PreferenceCategory>
 	
+	<Preference
+        android:key="always_on_display_schedule"
+        android:title="@string/always_on_display_schedule_title"
+        android:fragment="com.cherish.settings.fragments.AODSchedule" />
 	
 	<com.cherish.settings.preferences.SystemSettingSwitchPreference
         android:key="lockscreen_battery_info"
diff --git a/src/com/cherish/settings/fragments/AODSchedule.java b/src/com/cherish/settings/fragments/AODSchedule.java
new file mode 100644
index 0000000..80a24d9
--- /dev/null
+++ b/src/com/cherish/settings/fragments/AODSchedule.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2021 Yet Another AOSP Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.cherish.settings.fragments;
+
+import android.app.TimePickerDialog;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.os.Bundle;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.text.format.DateFormat;
+import android.widget.TimePicker;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settingslib.search.SearchIndexable;
+
+import com.cherish.settings.preferences.SecureSettingListPreference;
+
+@SearchIndexable
+public class AODSchedule extends SettingsPreferenceFragment implements
+        Preference.OnPreferenceClickListener, Preference.OnPreferenceChangeListener {
+
+    private static final String MODE_KEY = "doze_always_on_auto_mode";
+    private static final String SINCE_PREF_KEY = "doze_always_on_auto_since";
+    private static final String TILL_PREF_KEY = "doze_always_on_auto_till";
+
+    private SecureSettingListPreference mModePref;
+    private Preference mSincePref;
+    private Preference mTillPref;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.always_on_display_schedule);
+        PreferenceScreen screen = getPreferenceScreen();
+        ContentResolver resolver = getActivity().getContentResolver();
+
+        mSincePref = findPreference(SINCE_PREF_KEY);
+        mSincePref.setOnPreferenceClickListener(this);
+        mTillPref = findPreference(TILL_PREF_KEY);
+        mTillPref.setOnPreferenceClickListener(this);
+
+        int mode = Settings.Secure.getIntForUser(resolver,
+                MODE_KEY, 0, UserHandle.USER_CURRENT);
+        mModePref = (SecureSettingListPreference) findPreference(MODE_KEY);
+        mModePref.setValue(String.valueOf(mode));
+        mModePref.setSummary(mModePref.getEntry());
+        mModePref.setOnPreferenceChangeListener(this);
+
+        updateTimeEnablement(mode == 2);
+        updateTimeSummary(mode);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object objValue) {
+        int value = Integer.valueOf((String) objValue);
+        int index = mModePref.findIndexOfValue((String) objValue);
+        mModePref.setSummary(mModePref.getEntries()[index]);
+        Settings.Secure.putIntForUser(getActivity().getContentResolver(),
+                MODE_KEY, value, UserHandle.USER_CURRENT);
+        updateTimeEnablement(value == 2);
+        updateTimeSummary(value);
+        return true;
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        String[] times = getCustomTimeSetting();
+        boolean isSince = preference == mSincePref;
+        int hour, minute; hour = minute = 0;
+        TimePickerDialog.OnTimeSetListener listener = new TimePickerDialog.OnTimeSetListener() {
+            @Override
+            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
+                updateTimeSetting(isSince, hourOfDay, minute);
+            }
+        };
+        if (isSince) {
+            String[] sinceValues = times[0].split(":", 0);
+            hour = Integer.parseInt(sinceValues[0]);
+            minute = Integer.parseInt(sinceValues[1]);
+        } else {
+            String[] tillValues = times[1].split(":", 0);
+            hour = Integer.parseInt(tillValues[0]);
+            minute = Integer.parseInt(tillValues[1]);
+        }
+        TimePickerDialog dialog = new TimePickerDialog(getContext(), listener,
+                hour, minute, DateFormat.is24HourFormat(getContext()));
+        dialog.show();
+        return true;
+    }
+
+    private String[] getCustomTimeSetting() {
+        String value = Settings.Secure.getStringForUser(getActivity().getContentResolver(),
+                Settings.Secure.DOZE_ALWAYS_ON_AUTO_TIME, UserHandle.USER_CURRENT);
+        if (value == null || value.equals("")) value = "20:00,07:00";
+        return value.split(",", 0);
+    }
+
+    private void updateTimeEnablement(boolean enabled) {
+        mSincePref.setEnabled(enabled);
+        mTillPref.setEnabled(enabled);
+    }
+
+    private void updateTimeSummary(int mode) {
+        updateTimeSummary(getCustomTimeSetting(), mode);
+    }
+
+    private void updateTimeSummary(String[] times, int mode) {
+        if (mode == 0) {
+            mSincePref.setSummary("-");
+            mTillPref.setSummary("-");
+            return;
+        }
+        if (mode == 1) {
+            mSincePref.setSummary(R.string.always_on_display_schedule_sunset);
+            mTillPref.setSummary(R.string.always_on_display_schedule_sunrise);
+            return;
+        }
+        if (DateFormat.is24HourFormat(getContext())) {
+            mSincePref.setSummary(times[0]);
+            mTillPref.setSummary(times[1]);
+            return;
+        }
+        String[] sinceValues = times[0].split(":", 0);
+        String[] tillValues = times[1].split(":", 0);
+        int sinceHour = Integer.parseInt(sinceValues[0]);
+        int tillHour = Integer.parseInt(tillValues[0]);
+        String sinceSummary = "";
+        String tillSummary = "";
+        if (sinceHour > 12) {
+            sinceHour -= 12;
+            sinceSummary += String.valueOf(sinceHour) + ":" + sinceValues[1] + " PM";
+        } else {
+            sinceSummary = times[0].substring(1) + " AM";
+        }
+        if (tillHour > 12) {
+            tillHour -= 12;
+            tillSummary += String.valueOf(tillHour) + ":" + tillValues[1] + " PM";
+        } else {
+            tillSummary = times[0].substring(1) + " AM";
+        }
+        mSincePref.setSummary(sinceSummary);
+        mTillPref.setSummary(tillSummary);
+    }
+
+    private void updateTimeSetting(boolean since, int hour, int minute) {
+        String[] times = getCustomTimeSetting();
+        String nHour = "";
+        String nMinute = "";
+        if (hour < 10) nHour += "0";
+        if (minute < 10) nMinute += "0";
+        nHour += String.valueOf(hour);
+        nMinute += String.valueOf(minute);
+        times[since ? 0 : 1] = nHour + ":" + nMinute;
+        Settings.Secure.putStringForUser(getActivity().getContentResolver(),
+                Settings.Secure.DOZE_ALWAYS_ON_AUTO_TIME,
+                times[0] + "," + times[1], UserHandle.USER_CURRENT);
+        updateTimeSummary(times, 2);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.CHERISH_SETTINGS;
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.always_on_display_schedule);
+}
diff --git a/src/com/cherish/settings/fragments/LockScreenSettings.java b/src/com/cherish/settings/fragments/LockScreenSettings.java
index 98c23f8..3bab4e2 100644
--- a/src/com/cherish/settings/fragments/LockScreenSettings.java
+++ b/src/com/cherish/settings/fragments/LockScreenSettings.java
@@ -57,6 +57,10 @@ import java.util.List;
 @SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
 public class LockScreenSettings extends SettingsPreferenceFragment implements
         Preference.OnPreferenceChangeListener {
+			
+	private static final String AOD_SCHEDULE_KEY = "always_on_display_schedule";
+	
+	Preference mAODPref;
 
     @Override
     public void onCreate(Bundle icicle) {
@@ -76,11 +80,32 @@ public class LockScreenSettings extends SettingsPreferenceFragment implements
         } catch (NameNotFoundException e) {
             e.printStackTrace();
         }
+		
+		mAODPref = findPreference(AOD_SCHEDULE_KEY);
+        updateAlwaysOnSummary();
     }
 
     @Override
     public void onResume() {
         super.onResume();
+        updateAlwaysOnSummary();
+    }
+
+    private void updateAlwaysOnSummary() {
+        if (mAODPref == null) return;
+        int mode = Settings.Secure.getIntForUser(getActivity().getContentResolver(),
+                Settings.Secure.DOZE_ALWAYS_ON_AUTO_MODE, 0, UserHandle.USER_CURRENT);
+        switch (mode) {
+            case 0:
+                mAODPref.setSummary(R.string.disabled);
+                break;
+            case 1:
+                mAODPref.setSummary(R.string.night_display_auto_mode_twilight);
+                break;
+            case 2:
+                mAODPref.setSummary(R.string.night_display_auto_mode_custom);
+                break;
+        }
     }
 
     public boolean onPreferenceChange(Preference preference, Object newValue) {