diff --git a/app/src/main/java/de/sebse/fuplanner/tools/Conversion.java b/app/src/main/java/de/sebse/fuplanner/tools/Conversion.java
index 326a33b..0235d93 100644
--- a/app/src/main/java/de/sebse/fuplanner/tools/Conversion.java
+++ b/app/src/main/java/de/sebse/fuplanner/tools/Conversion.java
@@ -21,7 +21,7 @@ public class Conversion {
     }
 
     public static String getModifiedDateTime(Context context, long modified) {
-        return getModifiedDate(context, Locale.getDefault(), modified, "MM/dd/yy hh:mm");
+        return getModifiedDate(context, modified, "dd.MM.yy hh:mm");
     }
 
     @Deprecated
@@ -30,7 +30,7 @@ public class Conversion {
     }
 
     public static String getModifiedTime(Context context, long modified) {
-        return getModifiedDate(context, Locale.getDefault(), modified, "hh:mm");
+        return getModifiedDate(context, modified, "hh:mm");
     }
 
     @Deprecated
@@ -39,7 +39,11 @@ public class Conversion {
     }
 
     public static String getModifiedDate(Context context, long modified) {
-        return getModifiedDate(context, Locale.getDefault(), modified, "dd.MM.yy");
+        return getModifiedDate(context, modified, "dd.MM.yy");
+    }
+
+    public static String getModifiedDate(Context context, long modified, String skeleton) {
+        return getModifiedDate(context, Locale.getDefault(), modified, skeleton);
     }
 
     @SuppressLint("SimpleDateFormat")
@@ -49,7 +53,7 @@ public class Conversion {
         if (context != null && DateFormat.is24HourFormat(context))
             skeleton = skeleton.replaceAll("h", "H");
         else if (context == null)
-            log.w("No context spplied for conversion!");
+            log.w("No context applied for conversion!");
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
             dateFormat = new SimpleDateFormat(getDateFormat(locale, skeleton));
         } else {
diff --git a/app/src/main/java/de/sebse/fuplanner/tools/ui/weekview/WeekView.java b/app/src/main/java/de/sebse/fuplanner/tools/ui/weekview/WeekView.java
index 65c71a0..7e6a41e 100644
--- a/app/src/main/java/de/sebse/fuplanner/tools/ui/weekview/WeekView.java
+++ b/app/src/main/java/de/sebse/fuplanner/tools/ui/weekview/WeekView.java
@@ -43,11 +43,11 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collections;
-import java.util.Comparator;
 import java.util.List;
 import java.util.Locale;
 
 import de.sebse.fuplanner.R;
+import de.sebse.fuplanner.tools.Conversion;
 
 import static de.sebse.fuplanner.tools.ui.weekview.WeekViewUtil.daysBetween;
 import static de.sebse.fuplanner.tools.ui.weekview.WeekViewUtil.getPassedMinutesInDay;
@@ -155,8 +155,6 @@ public class WeekView extends View {
 
     private boolean mIsFirstDraw = true;
     private boolean mAreDimensionsInvalid = true;
-    @Deprecated
-    private int mDayNameLength = LENGTH_LONG;
     private int mOverlappingEventGap = 0;
     private int mEventMarginVertical = 0;
     private float mXScrollingSpeed = 1f;
@@ -471,14 +469,11 @@ public class WeekView extends View {
             mEventTextColor = a.getColor(R.styleable.WeekView_eventTextColor, mEventTextColor);
             mNewEventColor = a.getColor(R.styleable.WeekView_newEventColor, mNewEventColor);
             mNewEventIconDrawable = a.getDrawable(R.styleable.WeekView_newEventIconResource);
-            // For backward compatibility : Set "mNewEventIdentifier" if the attribute is "WeekView_newEventId" of type int
-            setNewEventId(a.getInt(R.styleable.WeekView_newEventId, Integer.parseInt(mNewEventIdentifier)));
             mNewEventIdentifier = (a.getString(R.styleable.WeekView_newEventIdentifier) != null) ? a.getString(R.styleable.WeekView_newEventIdentifier) : mNewEventIdentifier;
             mNewEventLengthInMinutes = a.getInt(R.styleable.WeekView_newEventLengthInMinutes, mNewEventLengthInMinutes);
             mNewEventTimeResolutionInMinutes = a.getInt(R.styleable.WeekView_newEventTimeResolutionInMinutes, mNewEventTimeResolutionInMinutes);
             mEventPadding = a.getDimensionPixelSize(R.styleable.WeekView_eventPadding, mEventPadding);
             mHeaderColumnBackgroundColor = a.getColor(R.styleable.WeekView_headerColumnBackground, mHeaderColumnBackgroundColor);
-            mDayNameLength = a.getInteger(R.styleable.WeekView_dayNameLength, mDayNameLength);
             mOverlappingEventGap = a.getDimensionPixelSize(R.styleable.WeekView_overlappingEventGap, mOverlappingEventGap);
             mEventMarginVertical = a.getDimensionPixelSize(R.styleable.WeekView_eventMarginVertical, mEventMarginVertical);
             mXScrollingSpeed = a.getFloat(R.styleable.WeekView_xScrollingSpeed, mXScrollingSpeed);
@@ -561,6 +556,7 @@ public class WeekView extends View {
         // Prepare hour separator color paint.
         mHourSeparatorPaint = new Paint();
         mHourSeparatorPaint.setStyle(Paint.Style.STROKE);
+        //noinspection SuspiciousNameCombination
         mHourSeparatorPaint.setStrokeWidth(mHourSeparatorHeight);
         mHourSeparatorPaint.setColor(mHourSeparatorColor);
 
@@ -879,7 +875,7 @@ public class WeekView extends View {
             boolean isToday = isSameDay(day, today);
 
             // Don't draw days which are outside requested range
-            if (!dateIsValid(day)) {
+            if (dateIsInvalid(day)) {
                 continue;
             }
 
@@ -967,7 +963,7 @@ public class WeekView extends View {
             boolean isToday = isSameDay(day, today);
 
             // Don't draw days which are outside requested range
-            if (!dateIsValid(day))
+            if (dateIsInvalid(day))
                 continue;
 
             // Draw the day labels.
@@ -1258,7 +1254,7 @@ public class WeekView extends View {
          * @param originalEvent The original event that was passed by the user.
          * @param rectF         The rectangle.
          */
-        public EventRect(WeekViewEvent event, WeekViewEvent originalEvent, RectF rectF) {
+        EventRect(WeekViewEvent event, WeekViewEvent originalEvent, RectF rectF) {
             this.event = event;
             this.rectF = rectF;
             this.originalEvent = originalEvent;
@@ -1371,19 +1367,16 @@ public class WeekView extends View {
      * @param eventRects The events to be sorted.
      */
     private void sortEventRects(List<EventRect> eventRects) {
-        Collections.sort(eventRects, new Comparator<EventRect>() {
-            @Override
-            public int compare(EventRect left, EventRect right) {
-                long start1 = left.event.getStartTime().getTimeInMillis();
-                long start2 = right.event.getStartTime().getTimeInMillis();
-                int comparator = start1 > start2 ? 1 : (start1 < start2 ? -1 : 0);
-                if (comparator == 0) {
-                    long end1 = left.event.getEndTime().getTimeInMillis();
-                    long end2 = right.event.getEndTime().getTimeInMillis();
-                    comparator = end1 > end2 ? 1 : (end1 < end2 ? -1 : 0);
-                }
-                return comparator;
+        Collections.sort(eventRects, (left, right) -> {
+            long start1 = left.event.getStartTime().getTimeInMillis();
+            long start2 = right.event.getStartTime().getTimeInMillis();
+            int comparator = Long.compare(start1, start2);
+            if (comparator == 0) {
+                long end1 = left.event.getEndTime().getTimeInMillis();
+                long end2 = right.event.getEndTime().getTimeInMillis();
+                comparator = Long.compare(end1, end2);
             }
+            return comparator;
         });
     }
 
@@ -1626,8 +1619,7 @@ public class WeekView extends View {
                 @Override
                 public String interpretDate(Calendar date) {
                     try {
-                        SimpleDateFormat sdf = mDayNameLength == LENGTH_SHORT ? new SimpleDateFormat("EEEEE M/dd", Locale.getDefault()) : new SimpleDateFormat("EEE M/dd", Locale.getDefault());
-                        return sdf.format(date.getTime()).toUpperCase();
+                        return Conversion.getModifiedDate(getContext(), date.getTimeInMillis(), "EEE dd.M").toUpperCase();
                     } catch (Exception e) {
                         e.printStackTrace();
                         return "";
@@ -1855,6 +1847,7 @@ public class WeekView extends View {
 
     public void setHourSeparatorHeight(int hourSeparatorHeight) {
         mHourSeparatorHeight = hourSeparatorHeight;
+        //noinspection SuspiciousNameCombination
         mHourSeparatorPaint.setStrokeWidth(mHourSeparatorHeight);
         invalidate();
     }
@@ -1968,35 +1961,6 @@ public class WeekView extends View {
         this.mNewEventTimeResolutionInMinutes = newEventTimeResolutionInMinutes;
     }
 
-    /**
-     * <b>Note:</b> Use {@link #setDateTimeInterpreter(DateTimeInterpreter)} and
-     * {@link #getDateTimeInterpreter()} instead.
-     *
-     * @return Either long or short day name is being used.
-     */
-    @Deprecated
-    public int getDayNameLength() {
-        return mDayNameLength;
-    }
-
-    /**
-     * Set the length of the day name displayed in the header row. Example of short day names is
-     * 'M' for 'Monday' and example of long day names is 'Mon' for 'Monday'.
-     * <p>
-     * <b>Note:</b> Use {@link #setDateTimeInterpreter(DateTimeInterpreter)} instead.
-     * </p>
-     *
-     * @param length Supported values are {@link WeekView#LENGTH_SHORT} and
-     *               {@link WeekView#LENGTH_LONG}.
-     */
-    @Deprecated
-    public void setDayNameLength(int length) {
-        if (length != LENGTH_LONG && length != LENGTH_SHORT) {
-            throw new IllegalArgumentException("length parameter must be either LENGTH_LONG or LENGTH_SHORT");
-        }
-        this.mDayNameLength = length;
-    }
-
     public int getOverlappingEventGap() {
         return mOverlappingEventGap;
     }
@@ -2600,12 +2564,7 @@ public class WeekView extends View {
      * @return true if scrolling should be stopped before reaching the end of animation.
      */
     private boolean forceFinishScroll() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-            // current velocity only available since api 14
-            return mScroller.getCurrVelocity() <= mMinimumFlingVelocity;
-        } else {
-            return false;
-        }
+        return mScroller.getCurrVelocity() <= mMinimumFlingVelocity;
     }
 
 
@@ -2697,14 +2656,8 @@ public class WeekView extends View {
      * @see #setMinDate(Calendar)
      * @see #setMaxDate(Calendar)
      */
-    public boolean dateIsValid(Calendar day) {
-        if (mMinDate != null && day.before(mMinDate)) {
-            return false;
-        }
-        if (mMaxDate != null && day.after(mMaxDate)) {
-            return false;
-        }
-        return true;
+    public boolean dateIsInvalid(Calendar day) {
+        return mMinDate != null && day.before(mMinDate) || mMaxDate != null && day.after(mMaxDate);
     }
 
     /////////////////////////////////////////////////////////////////
diff --git a/app/src/main/res/values/attrs.xml b/app/src/main/res/values/attrs.xml
index 40ac869..3848982 100644
--- a/app/src/main/res/values/attrs.xml
+++ b/app/src/main/res/values/attrs.xml
@@ -5,10 +5,6 @@
         <attr name="autoLimitTime" format="boolean" />
         <attr name="columnGap" format="dimension" />
         <attr name="dayBackgroundColor" format="color" />
-        <attr name="dayNameLength" format="enum">
-            <enum name="length_short" value="1" />
-            <enum name="length_long" value="2" />
-        </attr>
         <attr name="eventCornerRadius" format="dimension" />
         <attr name="eventMarginVertical" format="dimension" />
         <attr name="eventPadding" format="dimension" />
@@ -40,7 +36,6 @@
         <attr name="minTime" format="integer" />
         <attr name="minOverlappingMinutes" format="integer" />
         <attr name="newEventColor" format="color" />
-        <attr name="newEventId" format="integer" />
         <attr name="newEventIdentifier" format="string" />
         <attr name="newEventIconResource" format="integer" />
         <attr name="newEventLengthInMinutes" format="integer" />