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 ac074a140..03f50eddf 100644
--- a/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java
+++ b/app/src/main/java/com/simplemobiletools/calendar/activities/DayActivity.java
@@ -74,7 +74,8 @@ public class DayActivity extends SimpleActivity
         mDateTV.setText(date);
         mToBeDeleted = new ArrayList<>();
 
-        final int textColor = Utils.adjustAlpha(Color.BLACK, Constants.HIGH_ALPHA);
+        final int baseColor = mConfig.getIsDarkTheme() ? Color.WHITE : Color.BLACK;
+        final int textColor = Utils.adjustAlpha(baseColor, Constants.HIGH_ALPHA);
         mLeftArrow.getDrawable().mutate().setColorFilter(textColor, PorterDuff.Mode.SRC_ATOP);
         mRightArrow.getDrawable().mutate().setColorFilter(textColor, PorterDuff.Mode.SRC_ATOP);
     }
@@ -114,7 +115,8 @@ public class DayActivity extends SimpleActivity
 
     @OnClick(R.id.top_text)
     public void pickDay() {
-        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, R.style.MyAlertDialog);
+        final int theme = mConfig.getIsDarkTheme() ? R.style.MyAlertDialog_Dark : R.style.MyAlertDialog;
+        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, theme);
         final View view = getLayoutInflater().inflate(R.layout.date_picker, null);
         final DatePicker datePicker = (DatePicker) view.findViewById(R.id.date_picker);
 
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 d63e2a2bc..7209e2d9a 100644
--- a/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/calendar/activities/MainActivity.java
@@ -176,7 +176,8 @@ public class MainActivity extends SimpleActivity implements Calendar {
 
     @OnClick(R.id.top_text)
     public void pickMonth() {
-        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, R.style.MyAlertDialog);
+        final int theme = mConfig.getIsDarkTheme() ? R.style.MyAlertDialog_Dark : R.style.MyAlertDialog;
+        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, theme);
         final View view = getLayoutInflater().inflate(R.layout.date_picker, null);
         final DatePicker datePicker = (DatePicker) view.findViewById(R.id.date_picker);
         hideDayPicker(datePicker);
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 8861b4a12..2f3bb9909 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -53,6 +53,8 @@
 
     <style name="MyAlertDialog" parent="Base.Theme.AppCompat.Light.Dialog.Alert"/>
 
+    <style name="MyAlertDialog.Dark" parent="Base.Theme.AppCompat.Dialog.Alert"/>
+
     <style name="AppTheme.ActionBarStyle" parent="@style/Base.Widget.AppCompat.ActionBar">
         <item name="background">@color/colorPrimary</item>
         <item name="titleTextStyle">@style/AppTheme.ActionBar.TitleTextStyle</item>