diff --git a/android/src/main/java/com/henninghall/date_picker/PickerView.java b/android/src/main/java/com/henninghall/date_picker/PickerView.java
index 9f46ad0..327b446 100644
--- a/android/src/main/java/com/henninghall/date_picker/PickerView.java
+++ b/android/src/main/java/com/henninghall/date_picker/PickerView.java
@@ -75,12 +75,11 @@ public class PickerView extends RelativeLayout {
         minutesWheel = new MinutesWheel( this, R.id.minutes);
         ampmWheel = new AmPmWheel(this, R.id.ampm);
         hourWheel = new HourWheel(this, R.id.hour);
-        dateFormat = new SimpleDateFormat(getDateFormatTemplate(), Locale.US);
 
+        setDateFormat();
         changeAmPmWhenPassingMidnightOrNoon();
     }
 
-
     private final Runnable measureAndLayout = new Runnable() {
         @Override
         public void run() {
@@ -95,7 +94,7 @@ public class PickerView extends RelativeLayout {
         hourWheel.picker.setOnValueChangeListenerInScrolling(new NumberPickerView.OnValueChangeListenerInScrolling() {
             @Override
             public void onValueChangeInScrolling(NumberPickerView picker, int oldVal, int newVal) {
-                if(Utils.usesAmPm(locale)){
+                if(Settings.usesAmPm()){
                     String oldValue = hourWheel.getValueAtIndex(oldVal);
                     String newValue = hourWheel.getValueAtIndex(newVal);
                     boolean passingNoonOrMidnight = (oldValue.equals("12") && newValue.equals("11")) || oldValue.equals("11") && newValue.equals("12");
@@ -115,14 +114,15 @@ public class PickerView extends RelativeLayout {
         requireDisplayValueUpdate = true;
     }
 
-    public void setDate(String isoDate) {
+    public void f(String isoDate) {
         Calendar cal = Utils.isoToCalendar(isoDate, timeZone);
         applyOnAllWheels(new SetDate(cal));
+        update2DigitYearStart(cal);
     }
 
     public void setLocale(Locale locale) {
         this.locale = locale;
-        dateFormat = new SimpleDateFormat(getDateFormatTemplate(), Locale.US);
+        setDateFormat();
         wheelOrderUpdater.update(locale, mode);
         requireDisplayValueUpdate = true;
     }
@@ -172,7 +172,7 @@ public class PickerView extends RelativeLayout {
 
     public void setMode(Mode mode) {
         this.mode = mode;
-        dateFormat = new SimpleDateFormat(getDateFormatTemplate(), Locale.US);
+        setDateFormat();
         applyOnAllWheels(new UpdateVisibility());
         wheelOrderUpdater.update(locale, mode);
     }
@@ -226,4 +226,13 @@ public class PickerView extends RelativeLayout {
         if (maxDate == null) return null;
         return maxDate.get();
     }
+    public void setDateFormat(){
+        dateFormat = new SimpleDateFormat(getDateFormatTemplate(), Locale.US);
+    }
+    public void update2DigitYearStart(Calendar selectedDate){
+        Calendar cal = (Calendar) selectedDate.clone();
+        cal.add(Calendar.YEAR, -50); // subtract 50 years to hit the middle of the century
+        dateFormat.set2DigitYearStart(cal.getTime());
+    }
+
 }
diff --git a/android/src/main/java/com/henninghall/date_picker/Settings.java b/android/src/main/java/com/henninghall/date_picker/Settings.java
new file mode 100644
index 0000000..52c53ad
--- /dev/null
+++ b/android/src/main/java/com/henninghall/date_picker/Settings.java
@@ -0,0 +1,12 @@
+package com.henninghall.date_picker;
+
+
+import android.text.format.DateFormat;
+
+public class Settings {
+
+    public static boolean usesAmPm (){
+        return !DateFormat.is24HourFormat(DatePickerManager.context);
+    }
+
+}
diff --git a/android/src/main/java/com/henninghall/date_picker/Utils.java b/android/src/main/java/com/henninghall/date_picker/Utils.java
index efc090a..57c826b 100644
--- a/android/src/main/java/com/henninghall/date_picker/Utils.java
+++ b/android/src/main/java/com/henninghall/date_picker/Utils.java
@@ -18,11 +18,6 @@ import java.util.TimeZone;
 
 public class Utils {
 
-    public static boolean usesAmPm(Locale locale) {
-        DateFormat df = DateFormat.getTimeInstance(DateFormat.FULL, locale);
-        return df instanceof SimpleDateFormat && ((SimpleDateFormat) df).toPattern().contains("a");
-    }
-
     public static String printToday(Locale locale) {
         return PrettyTime.of(locale).printToday();
     }
diff --git a/android/src/main/java/com/henninghall/date_picker/wheels/AmPmWheel.java b/android/src/main/java/com/henninghall/date_picker/wheels/AmPmWheel.java
index 8c6677b..7908e13 100644
--- a/android/src/main/java/com/henninghall/date_picker/wheels/AmPmWheel.java
+++ b/android/src/main/java/com/henninghall/date_picker/wheels/AmPmWheel.java
@@ -2,6 +2,7 @@ package com.henninghall.date_picker.wheels;
 
 import com.henninghall.date_picker.Mode;
 import com.henninghall.date_picker.PickerView;
+import com.henninghall.date_picker.Settings;
 import com.henninghall.date_picker.Utils;
 import java.util.Calendar;
 import cn.carbswang.android.numberpickerview.library.NumberPickerView;
@@ -34,12 +35,12 @@ public class AmPmWheel extends Wheel {
 
     @Override
     public boolean visible() {
-        return Utils.usesAmPm(pickerView.locale) && pickerView.mode != Mode.date;
+        return Settings.usesAmPm() && pickerView.mode != Mode.date;
     }
 
     @Override
     public String getFormatTemplate() {
-        return Utils.usesAmPm(pickerView.locale) ? " a " : "";
+        return Settings.usesAmPm() ? " a " : "";
     }
 
 }
diff --git a/android/src/main/java/com/henninghall/date_picker/wheels/HourWheel.java b/android/src/main/java/com/henninghall/date_picker/wheels/HourWheel.java
index 27504d3..5aa574e 100644
--- a/android/src/main/java/com/henninghall/date_picker/wheels/HourWheel.java
+++ b/android/src/main/java/com/henninghall/date_picker/wheels/HourWheel.java
@@ -2,9 +2,11 @@ package com.henninghall.date_picker.wheels;
 
 import com.henninghall.date_picker.Mode;
 import com.henninghall.date_picker.PickerView;
+import com.henninghall.date_picker.Settings;
 import com.henninghall.date_picker.Utils;
 import java.util.Calendar;
 
+
 import cn.carbswang.android.numberpickerview.library.NumberPickerView;
 
 
@@ -16,7 +18,7 @@ public class HourWheel extends Wheel {
 
     @Override
     void init() {
-        int numberOfHours = Utils.usesAmPm(pickerView.locale) ? 12 : 24;
+        int numberOfHours = Settings.usesAmPm() ? 12 : 24;
         Calendar cal = pickerView.getInitialDate();
 
         for(int i=0; i<numberOfHours; i++) {
@@ -36,7 +38,7 @@ public class HourWheel extends Wheel {
 
     @Override
     public String getFormatTemplate() {
-        return Utils.usesAmPm(pickerView.locale) ? "h": "HH";
+        return Settings.usesAmPm() ? "h": "HH";
     }
 
 }