Fixing issue with day formatting

app/src/main/java/net/pokeranalytics/android/util/extensions/DateExtension.kt

@@ -77,7 +77,7 @@ fun Date.getDayNumber() : String {
 }
 // Return the 3 first letters of the date's day
 fun Date.getShortDayName() : String {
-    return SimpleDateFormat("EE", Locale.getDefault()).format(this).substring(0, 3)
+    return SimpleDateFormat("EEE", Locale.getDefault()).format(this)
 }
 // Return the month & year of the date
 fun Date.getMonthAndYear(): String {