'use strict';

angular.module('ddsApp').directive('ddsDateMonthYear', function() {
    return {
        require: 'ngModel',
        link: function(scope, elm, attrs, ctrl) {
            ctrl.$parsers.push(function(viewValue) {
                var result = moment(viewValue, ['MM/YY', 'MM/YYYY', 'MMMM YYYY', 'L', 'DD/MM/YY']);

                ctrl.$setValidity('ddsDateMonthYear', result.isValid());

                return result;
            });

            ctrl.$formatters.push(function(momentInstance) {
                if (! momentInstance) return;

                return momentInstance.format('MMM YYYY');
            });
        }
    };
});

'use strict';

angular.module('ddsApp').directive('ddsDateMonthYear', function() {
    return {
        require: 'ngModel',
        link: function(scope, elm, attrs, ctrl) {
            ctrl.$parsers.push(function(viewValue) {
                var result = moment(viewValue, ['MM/YY', 'MM/YYYY', 'MMMM YYYY']);

                ctrl.$setValidity('ddsDateMonthYear', result.isValid());

                return result;
            });

            ctrl.$formatters.push(function(momentInstance) {
                if (! momentInstance) return;

                return momentInstance.format('MMM YYYY');
            });
        }
    };
});

--- 
+++ 
@@ -5,7 +5,7 @@
         require: 'ngModel',
         link: function(scope, elm, attrs, ctrl) {
             ctrl.$parsers.push(function(viewValue) {
-                var result = moment(viewValue, ['MM/YY', 'MM/YYYY', 'MMMM YYYY', 'L', 'DD/MM/YY']);
+                var result = moment(viewValue, ['MM/YY', 'MM/YYYY', 'MMMM YYYY']);
 
                 ctrl.$setValidity('ddsDateMonthYear', result.isValid());
 
Support giving full dates in month-year inputs

From user testing