diff --git a/res/layout/notification_history.xml b/res/layout/notification_history.xml
index 557f1723a85..29744cc7846 100644
--- a/res/layout/notification_history.xml
+++ b/res/layout/notification_history.xml
@@ -186,9 +186,9 @@
                 android:layout_height="wrap_content"
                 android:orientation="vertical">
                 <TextView
+                    android:id="@+id/today_header"
                     android:layout_height="wrap_content"
                     android:layout_width="wrap_content"
-                    android:text="@string/notification_history_today"
                     android:textColor="?android:attr/textColorPrimary"
                     android:textAppearance="@style/TextAppearance.HomepageCardTitle"
                     android:paddingBottom="16dp" />
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 90d367dd51b..dda9d36558b 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -5722,7 +5722,7 @@
     <string name="notification_log_title">Notification log</string>
 
     <string name="notification_history_title">Notification history</string>
-    <string name="notification_history_today">Last 24 hours</string>
+    <string name="notification_history_today">Last %d hours</string>
     <string name="notification_history_snooze">Snoozed</string>
     <string name="notification_history_dismiss">Recently dismissed</string>
 
diff --git a/src/com/android/settings/notification/history/NotificationHistoryActivity.java b/src/com/android/settings/notification/history/NotificationHistoryActivity.java
index 021ba6fead8..b71d295f7f5 100644
--- a/src/com/android/settings/notification/history/NotificationHistoryActivity.java
+++ b/src/com/android/settings/notification/history/NotificationHistoryActivity.java
@@ -78,6 +78,7 @@ public class NotificationHistoryActivity extends CollapsingToolbarBaseActivity {
     // R.integer.config_notificationServiceArchiveSize, which is the Number of notifications kept
     // in the notification service historical archive
     private static final int MAX_RECENT_DISMISS_ITEM_COUNT = 50;
+    private static final int HISTORY_HOURS = 24;
 
     private ViewGroup mHistoryOn;
     private ViewGroup mHistoryOff;
@@ -243,6 +244,8 @@ public class NotificationHistoryActivity extends CollapsingToolbarBaseActivity {
         mHistoryOn = findViewById(R.id.history_on);
         mHistoryEmpty = findViewById(R.id.history_on_empty);
         mSwitchBar = findViewById(R.id.main_switch_bar);
+        ((TextView) findViewById(R.id.today_header)).setText(
+                getString(R.string.notification_history_today, HISTORY_HOURS));
 
         ActionBar actionBar = getActionBar();
         if (actionBar != null) {