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 8379d75bd..2e4ceb34d 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
@@ -16,6 +16,7 @@ public final class MiBandConst {
     public static final String PREF_MIBAND_DONT_ACK_TRANSFER = "mi_dont_ack_transfer";
     public static final String PREF_MIBAND_RESERVE_ALARM_FOR_CALENDAR = "mi_reserve_alarm_calendar";
     public static final String PREF_MIBAND_USE_HR_FOR_SLEEP_DETECTION = "mi_hr_sleep_detection";
+	public static final String PREF_MIBAND_DEVICE_TIME_OFFSET_HOURS = "mi_device_time_offset_hours";
 
 
     public static final String ORIGIN_SMS = "sms";
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java
index c4e8e83c0..505d35303 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java
@@ -140,6 +140,11 @@ public class MiBandCoordinator extends AbstractDeviceCoordinator {
         return location;
     }
 
+	public static int getDeviceTimeOffsetHours() throws IllegalArgumentException {
+		Prefs prefs = GBApplication.getPrefs();
+		return prefs.getInt(MiBandConst.PREF_MIBAND_DEVICE_TIME_OFFSET_HOURS, 0);
+	}
+
     public static boolean getHeartrateSleepSupport(String miBandAddress) throws IllegalArgumentException {
         Prefs prefs = GBApplication.getPrefs();
         return prefs.getBoolean(MiBandConst.PREF_MIBAND_USE_HR_FOR_SLEEP_DETECTION, false);
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandDateConverter.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandDateConverter.java
index 88a5e230c..e41cf9be8 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandDateConverter.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandDateConverter.java
@@ -40,6 +40,10 @@ public class MiBandDateConverter {
                     value[offset + 4],
                     value[offset + 5]);
 
+	        int offsetInHours = MiBandCoordinator.getDeviceTimeOffsetHours();
+	        if(offsetInHours != 0)
+		        timestamp.add(Calendar.HOUR_OF_DAY,-offsetInHours);
+
             return timestamp;
         }
 
@@ -53,6 +57,18 @@ public class MiBandDateConverter {
      * @return
      */
     public static byte[] calendarToRawBytes(Calendar timestamp) {
+
+	    // The mi-band device currently records sleep
+	    // only if it happens after 10pm and before 7am.
+	    // The offset is used to trick the device to record sleep
+	    // in non-standard hours.
+	    // If you usually sleep, say, from 6am to 2pm, set the
+	    // shift to -8, so at 6am the device thinks it's still 10pm
+	    // of the day before.
+	    int offsetInHours = MiBandCoordinator.getDeviceTimeOffsetHours();
+	    if(offsetInHours != 0)
+			timestamp.add(Calendar.HOUR_OF_DAY,offsetInHours);
+
         return new byte[]{
                 (byte) (timestamp.get(Calendar.YEAR) - 2000),
                 (byte) timestamp.get(Calendar.MONTH),
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandPreferencesActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandPreferencesActivity.java
index e49ae1abb..7fb29ce96 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandPreferencesActivity.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandPreferencesActivity.java
@@ -16,6 +16,7 @@ import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.OR
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.ORIGIN_PEBBLEMSG;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.ORIGIN_SMS;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MIBAND_ADDRESS;
+import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MIBAND_DEVICE_TIME_OFFSET_HOURS;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MIBAND_DONT_ACK_TRANSFER;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MIBAND_FITNESS_GOAL;
 import static nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst.PREF_MIBAND_RESERVE_ALARM_FOR_CALENDAR;
@@ -62,6 +63,7 @@ public class MiBandPreferencesActivity extends AbstractSettingsActivity {
                 PREF_MIBAND_ADDRESS,
                 PREF_MIBAND_FITNESS_GOAL,
                 PREF_MIBAND_RESERVE_ALARM_FOR_CALENDAR,
+		        PREF_MIBAND_DEVICE_TIME_OFFSET_HOURS,
                 getNotificationPrefKey(VIBRATION_COUNT, ORIGIN_SMS),
                 getNotificationPrefKey(VIBRATION_COUNT, ORIGIN_INCOMING_CALL),
                 getNotificationPrefKey(VIBRATION_COUNT, ORIGIN_K9MAIL),
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 3f0dc77a6..6ca7ee3b6 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -238,4 +238,5 @@
   <string name="updatefirmwareoperation_firmware_not_sent">Firmware non inviato</string>
   <string name="charts_legend_heartrate">Battito cardiaco</string>
   <string name="live_activity_heart_rate">Battito cardiaco</string>
+	<string name="miband_prefs_device_time_offset_hours">Offset orologio del dispositivo in ore (per l\'identificazione del sonno dei lavoratori a turni)</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 99275ef8c..988e59050 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -239,6 +239,7 @@
     <string name="fwinstaller_firmware_not_compatible_to_device">This firmware is not compatible with the device</string>
     <string name="miband_prefs_reserve_alarm_calendar">Alarms to reserve for upcoming events</string>
     <string name="miband_prefs_hr_sleep_detection">Use Heartrate Sensor to improve sleep detection</string>
+	<string name="miband_prefs_device_time_offset_hours">Device time offset in hours (for detecting sleep of shift workers)</string>
 
     <string name="waiting_for_reconnect">waiting for reconnect</string>
     <string name="appmananger_app_reinstall">Reinstall</string>
diff --git a/app/src/main/res/xml/miband_preferences.xml b/app/src/main/res/xml/miband_preferences.xml
index 37e5d7777..548884269 100644
--- a/app/src/main/res/xml/miband_preferences.xml
+++ b/app/src/main/res/xml/miband_preferences.xml
@@ -35,6 +35,14 @@
             android:defaultValue="false"
             android:key="mi_hr_sleep_detection"
             android:title="@string/miband_prefs_hr_sleep_detection" />
+
+		<EditTextPreference
+			android:defaultValue="0"
+			android:inputType="numberSigned"
+			android:key="mi_device_time_offset_hours"
+			android:maxLength="2"
+			android:title="@string/miband_prefs_device_time_offset_hours" />
+
     </PreferenceCategory>
 
     <PreferenceCategory