diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
index 1242801a5..65f9514e0 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java
@@ -52,6 +52,7 @@ import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.database.PeriodicExporter;
 import nodomain.freeyourgadget.gadgetbridge.devices.DeviceManager;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst;
 import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandPreferencesActivity;
 import nodomain.freeyourgadget.gadgetbridge.model.CannedMessagesSpec;
 import nodomain.freeyourgadget.gadgetbridge.util.AndroidUtils;
@@ -64,6 +65,11 @@ import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PR
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI2_DISPLAY_ITEMS;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI2_ENABLE_TEXT_NOTIFICATIONS;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_BAND_SCREEN_UNLOCK;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_NIGHT_MODE;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_NIGHT_MODE_END;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_NIGHT_MODE_OFF;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_NIGHT_MODE_SCHEDULED;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MI3_NIGHT_MODE_START;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_HEIGHT_CM;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_SLEEP_DURATION;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_STEPS_GOAL;
@@ -87,6 +93,8 @@ public class SettingsActivity extends AbstractSettingsActivity {
     protected void onPostCreate(Bundle savedInstanceState) {
         super.onPostCreate(savedInstanceState);
 
+        Prefs prefs = GBApplication.getPrefs();
+
         Preference pref = findPreference("notifications_generic");
         pref.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
             public boolean onPreferenceClick(Preference preference) {
@@ -419,6 +427,60 @@ public class SettingsActivity extends AbstractSettingsActivity {
             }
         });
 
+        String nightModeState = prefs.getString(MiBandConst.PREF_MI3_NIGHT_MODE, PREF_MI3_NIGHT_MODE_OFF);
+        boolean nightModeScheduled = nightModeState.equals(PREF_MI3_NIGHT_MODE_SCHEDULED);
+
+        final Preference nightModeStart = findPreference(PREF_MI3_NIGHT_MODE_START);
+        nightModeStart.setEnabled(nightModeScheduled);
+        nightModeStart.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newVal) {
+                invokeLater(new Runnable() {
+                    @Override
+                    public void run() {
+                        GBApplication.deviceService().onSendConfiguration(PREF_MI3_NIGHT_MODE_START);
+                    }
+                });
+                return true;
+            }
+        });
+
+
+        final Preference nightModeEnd = findPreference(PREF_MI3_NIGHT_MODE_END);
+        nightModeEnd.setEnabled(nightModeScheduled);
+        nightModeEnd.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newVal) {
+                invokeLater(new Runnable() {
+                    @Override
+                    public void run() {
+                        GBApplication.deviceService().onSendConfiguration(PREF_MI3_NIGHT_MODE_END);
+                    }
+                });
+                return true;
+            }
+        });
+
+
+        final Preference nightMode = findPreference(PREF_MI3_NIGHT_MODE);
+        nightMode.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newVal) {
+                final boolean scheduled = PREF_MI3_NIGHT_MODE_SCHEDULED.equals(newVal.toString());
+
+                nightModeStart.setEnabled(scheduled);
+                nightModeEnd.setEnabled(scheduled);
+
+                invokeLater(new Runnable() {
+                    @Override
+                    public void run() {
+                        GBApplication.deviceService().onSendConfiguration(PREF_MI3_NIGHT_MODE);
+                    }
+                });
+                return true;
+            }
+        });
+
         final Preference corDisplayItems = findPreference("cor_display_items");
         corDisplayItems.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
             @Override
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Coordinator.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Coordinator.java
index 39035982b..4d48d0b5c 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Coordinator.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Coordinator.java
@@ -24,6 +24,8 @@ import android.support.annotation.NonNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.Date;
+
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
@@ -78,4 +80,18 @@ public class MiBand3Coordinator extends HuamiCoordinator {
         Prefs prefs = GBApplication.getPrefs();
         return prefs.getBoolean(MiBandConst.PREF_MI3_BAND_SCREEN_UNLOCK, false);
     }
+
+    public static String getNightMode() {
+        Prefs prefs = GBApplication.getPrefs();
+
+        return prefs.getString(MiBandConst.PREF_MI3_NIGHT_MODE, MiBandConst.PREF_MI3_NIGHT_MODE_OFF);
+    }
+
+    public static Date getNightModeStart() {
+        return getTimePreference( MiBandConst.PREF_MI3_NIGHT_MODE_START, "16:00");
+    }
+
+    public static Date getNightModeEnd() {
+        return getTimePreference(MiBandConst.PREF_MI3_NIGHT_MODE_END, "07:00");
+    }
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Service.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Service.java
index 31cdf89ad..6ad375532 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Service.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband3/MiBand3Service.java
@@ -25,4 +25,7 @@ public class MiBand3Service {
     public static final byte[] COMMAND_CHANGE_SCREENS = new byte[]{ENDPOINT_DISPLAY_ITEMS, DISPLAY_ITEM_BIT_CLOCK, 0x30, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00};
     public static final byte[] COMMAND_ENABLE_BAND_SCREEN_UNLOCK = new byte[]{ENDPOINT_DISPLAY, 0x16, 0x00, 0x01};
     public static final byte[] COMMAND_DISABLE_BAND_SCREEN_UNLOCK = new byte[]{ENDPOINT_DISPLAY, 0x16, 0x00, 0x00};
+    public static final byte[] COMMAND_NIGHT_MODE_OFF = new byte[]{0x1a, 0x00};
+    public static final byte[] COMMAND_NIGHT_MODE_SUNSET = new byte[]{0x1a, 0x02};
+    public static final byte[] COMMAND_NIGHT_MODE_SCHEDULED = new byte[]{0x1a, 0x01, 0x10, 0x00, 0x07, 0x00};
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandConst.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandConst.java
index 0358dfb07..66cb6aa8f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandConst.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandConst.java
@@ -70,6 +70,12 @@ public final class MiBandConst {
     public static final String PREF_MIBAND_SETUP_BT_PAIRING = "mi_setup_bt_pairing";
 
     public static final String PREF_MI3_BAND_SCREEN_UNLOCK = "mi3_band_screen_unlock";
+    public static final String PREF_MI3_NIGHT_MODE = "mi3_night_mode";
+    public static final String PREF_MI3_NIGHT_MODE_START = "mi3_night_mode_start";
+    public static final String PREF_MI3_NIGHT_MODE_END = "mi3_night_mode_end";
+    public static final String PREF_MI3_NIGHT_MODE_OFF = "off";
+    public static final String PREF_MI3_NIGHT_MODE_SUNSET = "sunset";
+    public static final String PREF_MI3_NIGHT_MODE_SCHEDULED = "scheduled";
 
     public static final String ORIGIN_INCOMING_CALL = "incoming_call";
     public static final String ORIGIN_ALARM_CLOCK = "alarm_clock";
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband3/MiBand3Support.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband3/MiBand3Support.java
index b5ee908c6..599710e85 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband3/MiBand3Support.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband3/MiBand3Support.java
@@ -24,6 +24,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
 import java.util.Locale;
 import java.util.Set;
 
@@ -94,6 +97,11 @@ public class MiBand3Support extends AmazfitBipSupport {
                 case MiBandConst.PREF_MI3_BAND_SCREEN_UNLOCK:
                     setBandScreenUnlock(builder);
                     break;
+                case MiBandConst.PREF_MI3_NIGHT_MODE:
+                case MiBandConst.PREF_MI3_NIGHT_MODE_START:
+                case MiBandConst.PREF_MI3_NIGHT_MODE_END:
+                    setNightMode(builder);
+                    break;
                 default:
                     super.onSendConfiguration(config);
                     return;
@@ -140,11 +148,48 @@ public class MiBand3Support extends AmazfitBipSupport {
         return this;
     }
 
+    private MiBand3Support setNightMode(TransactionBuilder builder) {
+        String nightMode = MiBand3Coordinator.getNightMode();
+        LOG.info("Setting night mode to " + nightMode);
+
+        switch (nightMode) {
+            case MiBandConst.PREF_MI3_NIGHT_MODE_SUNSET:
+                builder.write(getCharacteristic(HuamiService.UUID_CHARACTERISTIC_3_CONFIGURATION), MiBand3Service.COMMAND_NIGHT_MODE_SUNSET);
+                break;
+            case MiBandConst.PREF_MI3_NIGHT_MODE_OFF:
+                builder.write(getCharacteristic(HuamiService.UUID_CHARACTERISTIC_3_CONFIGURATION), MiBand3Service.COMMAND_NIGHT_MODE_OFF);
+                break;
+            case MiBandConst.PREF_MI3_NIGHT_MODE_SCHEDULED:
+                byte[] cmd = MiBand3Service.COMMAND_NIGHT_MODE_SCHEDULED.clone();
+
+                Calendar calendar = GregorianCalendar.getInstance();
+
+                Date start = MiBand3Coordinator.getNightModeStart();
+                calendar.setTime(start);
+                cmd[2] = (byte) calendar.get(Calendar.HOUR_OF_DAY);
+                cmd[3] = (byte) calendar.get(Calendar.MINUTE);
+
+                Date end = MiBand3Coordinator.getNightModeEnd();
+                calendar.setTime(end);
+                cmd[4] = (byte) calendar.get(Calendar.HOUR_OF_DAY);
+                cmd[5] = (byte) calendar.get(Calendar.MINUTE);
+
+                builder.write(getCharacteristic(HuamiService.UUID_CHARACTERISTIC_3_CONFIGURATION), cmd);
+                break;
+            default:
+                LOG.error("Invalid night mode: " + nightMode);
+                break;
+        }
+
+        return this;
+    }
+
     @Override
     public void phase2Initialize(TransactionBuilder builder) {
         super.phase2Initialize(builder);
         LOG.info("phase2Initialize...");
         setBandScreenUnlock(builder);
+        setNightMode(builder);
     }
 
     @Override
diff --git a/app/src/main/res/values/arrays.xml b/app/src/main/res/values/arrays.xml
index 39dfa2fc0..450218da8 100644
--- a/app/src/main/res/values/arrays.xml
+++ b/app/src/main/res/values/arrays.xml
@@ -170,6 +170,17 @@
         <item>@string/p_scheduled</item>
     </string-array>
 
+    <string-array name="mi3_night_mode">
+        <item>@string/off</item>
+        <item>@string/mi3_night_mode_sunset</item>
+        <item>@string/mi2_dnd_scheduled</item>
+    </string-array>
+    <string-array name="mi3_night_mode_values">
+        <item>@string/p_off</item>
+        <item>@string/p_sunset</item>
+        <item>@string/p_scheduled</item>
+    </string-array>
+
     <string-array name="pref_mi2_display_items">
         <item>@string/chart_steps</item>
         <item>@string/distance</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 66e48cfc7..ea12ea521 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -440,6 +440,9 @@
     <string name="mi2_prefs_do_not_disturb_end">End time</string>
     <string name="mi3_prefs_band_screen_unlock">Band screen unlock"</string>
     <string name="mi3_prefs_band_screen_unlock_summary">Swipe up to unlock the band\'s screen</string>
+    <string name="mi3_prefs_night_mode">Night mode</string>
+    <string name="mi3_prefs_night_mode_summary">Lower band screen brightness automatically at night</string>
+
     <string name="automatic">Automatic</string>
     <string name="simplified_chinese">Simplified Chinese</string>
     <string name="traditional_chinese">Traditional Chinese</string>
@@ -537,6 +540,7 @@
     <string name="on">On</string>
     <string name="off">Off</string>
     <string name="mi2_dnd_off">Off</string>
+    <string name="mi3_night_mode_sunset">At sunset</string>
     <string name="mi2_dnd_automatic">Automatic (sleep detection)</string>
     <string name="mi2_dnd_scheduled">Scheduled (time interval)</string>
     <string name="discovery_attempting_to_pair">Attempting to pair with %1$s</string>
diff --git a/app/src/main/res/values/values.xml b/app/src/main/res/values/values.xml
index 96d5d895c..570783715 100644
--- a/app/src/main/res/values/values.xml
+++ b/app/src/main/res/values/values.xml
@@ -35,6 +35,7 @@
 
     <item name="p_off" type="string">off</item>
     <item name="p_on" type="string">on</item>
+    <item name="p_sunset" type="string">sunset</item>
     <item name="p_automatic" type="string">automatic</item>
     <item name="p_scheduled" type="string">scheduled</item>
 
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index 6744c4e4b..d4ada4d19 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -251,6 +251,33 @@
                 android:key="miband3_display_items"
                 android:summary="@string/mi2_prefs_display_items_summary"
                 android:title="@string/mi2_prefs_display_items"/>
+            <PreferenceScreen
+                android:persistent="false"
+                android:title="@string/mi3_prefs_night_mode"
+                android:summary="@string/mi3_prefs_night_mode_summary">
+
+                <!-- workaround for missing toolbar -->
+                <PreferenceCategory android:title="@string/mi3_prefs_night_mode" />
+
+                <ListPreference
+                    android:defaultValue="@string/p_off"
+                    android:entries="@array/mi3_night_mode"
+                    android:entryValues="@array/mi3_night_mode_values"
+                    android:key="mi3_night_mode"
+                    android:summary="%s"
+                    android:title="@string/mi3_prefs_night_mode" />
+
+                <nodomain.freeyourgadget.gadgetbridge.util.TimePreference
+                    android:defaultValue="16:00"
+                    android:key="mi3_night_mode_start"
+                    android:title="@string/mi2_prefs_do_not_disturb_start" />
+
+                <nodomain.freeyourgadget.gadgetbridge.util.TimePreference
+                    android:defaultValue="7:00"
+                    android:key="mi3_night_mode_end"
+                    android:title="@string/mi2_prefs_do_not_disturb_end" />
+
+            </PreferenceScreen>
         </PreferenceScreen>
         <PreferenceScreen
             android:icon="@drawable/ic_device_hplus"