title: Get DateTime dayOfWeek/dayOfMonth as String
body: <p>How can I get the day of week or month as a String? Without having to do something like:</p>
  
  <pre><code>        DateTime now = DateTime.now();
          String dayOfWeek = null;
          switch(now.getDayOfWeek()) {
              case DateTimeConstants.MONDAY:
                  dayOfWeek = "Monday";
                  break;
              case DateTimeConstants.TUESDAY:
                  dayOfWeek = "Tuesday";
                  break;
              case DateTimeConstants.WEDNESDAY:
                  dayOfWeek = "Wednesday";
                  break;
              case DateTimeConstants.THURSDAY:
                  dayOfWeek = "Thursday";
                  break;
              case DateTimeConstants.FRIDAY:
                  dayOfWeek = "Friday";
                  break;
              case DateTimeConstants.SATURDAY:
                  dayOfWeek = "Saturday";
                  break;
              case DateTimeConstants.SUNDAY:
                  dayOfWeek = "Sunday";
                  break;
          }
  </code></pre>