diff --git a/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java b/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java
index bd1c4036b..69ab0665a 100644
--- a/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java
+++ b/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java
@@ -124,8 +124,8 @@ public class DayActivity extends SimpleActivity
         datePicker.init(dateTime.getYear(), dateTime.getMonthOfYear() - 1, dateTime.getDayOfMonth(), null);
 
         alertDialog.setView(view);
-        alertDialog.setNegativeButton("Cancel", null);
-        alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
+        alertDialog.setNegativeButton(android.R.string.cancel, null);
+        alertDialog.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int id) {
                 final int month = datePicker.getMonth() + 1;
                 final int year = datePicker.getYear();
diff --git a/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java b/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java
index 58bfdb621..746e2d19b 100644
--- a/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java
@@ -187,8 +187,8 @@ public class MainActivity extends SimpleActivity implements Calendar {
         datePicker.init(dateTime.getYear(), dateTime.getMonthOfYear() - 1, 1, null);
 
         alertDialog.setView(view);
-        alertDialog.setNegativeButton("Cancel", null);
-        alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
+        alertDialog.setNegativeButton(android.R.string.cancel, null);
+        alertDialog.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int id) {
                 final int month = datePicker.getMonth() + 1;
                 final int year = datePicker.getYear();
diff --git a/app/src/main/res/layout/widget_config.xml b/app/src/main/res/layout/widget_config.xml
index 3cc83cd5f..bbcc4025d 100644
--- a/app/src/main/res/layout/widget_config.xml
+++ b/app/src/main/res/layout/widget_config.xml
@@ -53,7 +53,7 @@
         android:fontFamily="sans-serif-light"
         android:paddingLeft="@dimen/activity_margin"
         android:paddingRight="@dimen/activity_margin"
-        android:text="OK"
+        android:text="@android:string/ok"
         android:textColor="@android:color/white"
         android:textSize="@dimen/config_text_size"/>
 </RelativeLayout>