Commit 1b7436a

@@ -23,8 +23,9 @@ public class WeekDay {
   public static final int THURSDAY = 4;
   public static final int FRIDAY = 5;
   public static final int SATURDAY = 6;
-  private static String[] DAYS =
+  private static final String[] DAYS =
       new String[] {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
+  private static final int[] MONTHS = new int[] {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 
   public String getWeekDay(int day, int month, int year) {
     return DAYS[daysSinceEpoch(day, month, year) % 7];
@@ -49,34 +50,7 @@ public class WeekDay {
   }
 
   private int daysInMonth(int month) {
-    switch (month) {
-      case 1:
-        return 31;
-      case 2:
-        return 28;
-      case 3:
-        return 31;
-      case 4:
-        return 30;
-      case 5:
-        return 31;
-      case 6:
-        return 30;
-      case 7:
-        return 31;
-      case 8:
-        return 31;
-      case 9:
-        return 30;
-      case 10:
-        return 31;
-      case 11:
-        return 30;
-      case 12:
-        return 31;
-      default:
-        return 0;
-    }
+    return MONTHS[month - 1];
   }
 
   public static void main(String[] args) {