diff --git a/res/values/strings.xml b/res/values/strings.xml
index 4780e52f960..3d1c90c83c6 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -571,11 +571,15 @@
     <string name="roaming_warning">Roaming charges may apply.</string>
 
     <!-- Date & time setting screen setting switch title: whether the system clock (Unix epoch time) should be determined automatically [CHAR LIMIT=100] -->
-    <string name="date_time_auto">Set time automatically</string>
+    <string name="date_time_auto">Automatic date and time</string>
+    <!-- Date & time setting screen setting switch summary: whether the system clock (Unix epoch time) should be determined automatically [CHAR LIMIT=100] -->
+    <string name="date_time_auto_summary">Set automatically using your network and wireless signals</string>
     <!-- Date & time setting screen setting switch title: whether the time zone should be determined automatically [CHAR LIMIT=100]  -->
-    <string name="zone_auto_title">Set automatically</string>
+    <string name="zone_auto_title">Automatic time zone</string>
+    <!-- Date & time setting screen setting switch summary: whether the time zone should be determined automatically [CHAR LIMIT=100]  -->
+    <string name="zone_auto_title_summary">Set automatically based on mobile networks near you</string>
     <!-- Date & time setting screen setting switch summary for non-telephony devices [CHAR LIMIT=100] -->
-    <string name="auto_zone_requires_location_summary">Location will be used for setting the time zone when this toggle is on</string>
+    <string name="auto_zone_requires_location_summary">Set automatically using your device location, if available. An active Wifi connection may also be required.</string>
     <!-- Date & time setting screen setting option summary text for the automatic 24 hour setting checkbox [CHAR LIMIT=100] -->
     <string name="date_time_24hour_auto">Use locale default</string>
     <!-- Date & time setting screen setting check box title -->
@@ -3772,7 +3776,7 @@
     <string name="location_services_screen_title">Location services</string>
 
     <!-- [CHAR LIMIT=60] Date&Time settings screen, toggle button title -->
-    <string name="location_time_zone_detection_toggle_title">Use location</string>
+    <string name="location_time_zone_detection_toggle_title">Use location for time zone</string>
     <!-- [CHAR LIMIT=50] Date&Time settings screen, title of the dialog when AutoTimeZone is degraded -->
     <string name="location_time_zone_detection_status_title">Cannot set the time zone automatically</string>
     <!-- Date&Time settings screen, summary of the dialog when AutoTimeZone is degraded by settings-->
@@ -3800,7 +3804,7 @@
     <!-- [CHAR LIMIT=NONE] Location settings screen, summary when location time zone detection is not
          applicable due to other settings like the "automatic time zone detection enabled" setting
          being set to "off". -->
-    <string name="location_time_zone_detection_auto_is_off">Automatic time zone is off</string>
+    <string name="location_time_zone_detection_auto_is_off">Not available when automatic time zone is off</string>
     <!-- [CHAR LIMIT=NONE] Location settings screen, summary when location time zone detection is not
          applicable for the user for unspecified reasons. More specific messages are used when there
          is a clear reason. -->
@@ -3811,7 +3815,7 @@
          allowed for the user, e.g. because of device policy -->
     <string name="location_time_zone_detection_not_allowed">Location time zone detection changes are not allowed</string>
     <!-- [CHAR LIMIT=NONE] Location settings screen, summary when location time zone detection is enabled. -->
-    <string name="location_time_zone_detection_auto_is_on">Location may be used to set time zone</string>
+    <string name="location_time_zone_detection_auto_is_on">If your device location is available, it may be used to set your time zone</string>
     <!-- Main settings screen, setting summary for the user to go into the About phone screen-->
     <string name="about_settings_summary">View legal info, status, software version</string>
     <!-- About phone settings screen, setting option name to go to dialog that shows legal info -->
diff --git a/res/xml/date_time_prefs.xml b/res/xml/date_time_prefs.xml
index 3fb4a065d7c..d8643be35f9 100644
--- a/res/xml/date_time_prefs.xml
+++ b/res/xml/date_time_prefs.xml
@@ -23,7 +23,7 @@
     <com.android.settingslib.RestrictedSwitchPreference
         android:key="auto_time"
         android:title="@string/date_time_auto"
-        settings:useAdditionalSummary="true"
+        android:summary="@string/summary_placeholder"
         settings:userRestriction="no_config_date_time"
         settings:controller="com.android.settings.datetime.AutoTimePreferenceController" />
 
@@ -48,6 +48,7 @@
         <com.android.settingslib.RestrictedSwitchPreference
             android:key="auto_zone"
             android:title="@string/zone_auto_title"
+            android:summary="@string/summary_placeholder"
             settings:userRestriction="no_config_date_time"
             settings:controller="com.android.settings.datetime.AutoTimeZonePreferenceController" />
 
@@ -60,6 +61,7 @@
         <SwitchPreferenceCompat
             android:key="location_time_zone_detection"
             android:title="@string/location_time_zone_detection_toggle_title"
+            android:summary="@string/summary_placeholder"
             settings:controller="com.android.settings.datetime.LocationTimeZoneDetectionPreferenceController"/>
 
         <com.android.settingslib.RestrictedPreference
diff --git a/src/com/android/settings/datetime/AutoTimePreferenceController.java b/src/com/android/settings/datetime/AutoTimePreferenceController.java
index 2942acb1956..5b17e7ecb6c 100644
--- a/src/com/android/settings/datetime/AutoTimePreferenceController.java
+++ b/src/com/android/settings/datetime/AutoTimePreferenceController.java
@@ -27,6 +27,8 @@ import android.app.time.TimeConfiguration;
 import android.app.time.TimeManager;
 import android.content.Context;
 
+import androidx.preference.Preference;
+
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.settings.R;
 import com.android.settings.core.TogglePreferenceController;
@@ -76,6 +78,17 @@ public class AutoTimePreferenceController extends TogglePreferenceController {
         }
     }
 
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        refreshSummary(preference);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return mContext.getString(R.string.date_time_auto_summary);
+    }
+
     @Override
     public boolean isChecked() {
         return isEnabled();
diff --git a/src/com/android/settings/datetime/AutoTimeZonePreferenceController.java b/src/com/android/settings/datetime/AutoTimeZonePreferenceController.java
index 8eccf319784..2f062897b48 100644
--- a/src/com/android/settings/datetime/AutoTimeZonePreferenceController.java
+++ b/src/com/android/settings/datetime/AutoTimeZonePreferenceController.java
@@ -129,11 +129,11 @@ public class AutoTimeZonePreferenceController extends TogglePreferenceController
         // time zone must use location.
         if (LocationProviderStatusPreferenceController.hasLocationTimeZoneNoTelephonyFallback(
                 mTimeManager.getTimeZoneCapabilitiesAndConfig().getDetectorStatus())) {
-            return mContext.getResources().getString(R.string.auto_zone_requires_location_summary);
+            return mContext.getString(R.string.auto_zone_requires_location_summary);
         }
-        // If the user has a dedicated toggle to control location use, the summary can
-        // be empty because the use of location is explicit.
-        return "";
+
+        // If the user has a dedicated toggle to control location use, explain what it does.
+        return mContext.getString(R.string.zone_auto_title_summary);
     }
 
     @VisibleForTesting
diff --git a/tests/robotests/src/com/android/settings/datetime/AutoTimePreferenceControllerTest.java b/tests/robotests/src/com/android/settings/datetime/AutoTimePreferenceControllerTest.java
index 9ac318a542a..ffb5141171c 100644
--- a/tests/robotests/src/com/android/settings/datetime/AutoTimePreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/datetime/AutoTimePreferenceControllerTest.java
@@ -34,6 +34,8 @@ import android.os.UserHandle;
 
 import androidx.preference.Preference;
 
+import com.android.settings.R;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -153,6 +155,12 @@ public class AutoTimePreferenceControllerTest {
         assertThat(mController.isEnabled()).isFalse();
     }
 
+    @Test
+    public void getSummary() {
+        assertThat(mController.getSummary().toString()).isEqualTo(
+                mContext.getString(R.string.date_time_auto_summary));
+    }
+
     private static TimeCapabilitiesAndConfig createCapabilitiesAndConfig(boolean autoSupported,
             boolean autoEnabled) {
         int configureAutoDetectionEnabledCapability =
diff --git a/tests/robotests/src/com/android/settings/datetime/AutoTimeZonePreferenceControllerTest.java b/tests/robotests/src/com/android/settings/datetime/AutoTimeZonePreferenceControllerTest.java
index c2d0445e023..651915b4cab 100644
--- a/tests/robotests/src/com/android/settings/datetime/AutoTimeZonePreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/datetime/AutoTimeZonePreferenceControllerTest.java
@@ -225,7 +225,8 @@ public class AutoTimeZonePreferenceControllerTest {
         when(mTimeManager.getTimeZoneCapabilitiesAndConfig()).thenReturn(capabilitiesAndConfig);
         when(mTimeManager.updateTimeZoneConfiguration(Mockito.any())).thenReturn(true);
 
-        assertThat(mController.getSummary()).isEqualTo("");
+        assertThat(mController.getSummary().toString()).isEqualTo(
+                mContext.getString(R.string.zone_auto_title_summary));
 
         capabilitiesAndConfig = createCapabilitiesAndConfig(
                 /* autoSupported= */true, /* autoEnabled= */true, /* telephonySupported= */
@@ -233,7 +234,7 @@ public class AutoTimeZonePreferenceControllerTest {
         when(mTimeManager.getTimeZoneCapabilitiesAndConfig()).thenReturn(capabilitiesAndConfig);
         when(mTimeManager.updateTimeZoneConfiguration(Mockito.any())).thenReturn(true);
 
-        assertThat(mController.getSummary()).isEqualTo(
+        assertThat(mController.getSummary().toString()).isEqualTo(
                 mContext.getString(R.string.auto_zone_requires_location_summary));
     }