AngularJS directives for formatting arrays of dates.

gistfile1.js

angular.module('kf.filters', []).
  /**
   * @ngdoc filter
   * @name kf.filters:dates
   * @function
   *
   * @description
   * Passed an Array of Dates, returns a String joining them together with a delimiter. The dates
   * themselves may be customized with an Angular `date` filter specifier.
   *
   * @param {Array} input The source Array of Dates.
   * @param {string=} format Formatting rules (see Angular's `date` filter).
   * @param {string=} delimiter Delimiter separating the dates. If not specified, ` - ` is used.
   */
  filter('dates', function($filter) {
    return function(input, format, delimiter) {
      delimiter = delimiter || ', ';
      return input.map(function(date) { return $filter('date')(date, format); }).join(delimiter);
    };
  }).

  /**
   * @ngdoc filter
   * @name kf.filters:dateRange
   * @function
   *
   * @description
   * Passed an Array of Dates, returns a String joining the first and last Dates with a delimiter.
   * The dates themselves may be customized with an Angular `date` filter specifier.
   *
   * @param {Array} input The source Array of Dates.
   * @param {string=} format Formatting rules (see Angular's `date` filter).
   * @param {string=} delimiter Delimiter separating the two dates. If not specified, ` - ` is used.
   */
  filter('dateRange', function($filter) {
    return function(input, format, delimiter) {
      delimiter = delimiter || ' - ';
      var ends = [], last = input.length - 1;
      if(last >= 0) { ends.push(input[0]); }
      if(last >= 1) { ends.push(input[last]); }
      return $filter('dates')(ends, format, delimiter);
    };
  });

Demo fiddle: http://jsfiddle.net/blangenfeld/vdNz2/