diff --git a/src/dateparser/dateparser.js b/src/dateparser/dateparser.js
index 9a44c3bb47..66f11ff5c3 100644
--- a/src/dateparser/dateparser.js
+++ b/src/dateparser/dateparser.js
@@ -53,6 +53,10 @@ angular.module('ui.bootstrap.dateparser', [])
       regex: '(?:0|1)[0-9]|2[0-3]',
       apply: function(value) { this.hours = +value; }
     },
+    'hh': {
+      regex: '0[0-9]|1[0-2]',
+      apply: function(value) { this.hours = +value; }
+    },
     'H': {
       regex: '1?[0-9]|2[0-3]',
       apply: function(value) { this.hours = +value; }
@@ -76,6 +80,18 @@ angular.module('ui.bootstrap.dateparser', [])
     's': {
       regex: '[0-9]|[1-5][0-9]',
       apply: function(value) { this.seconds = +value; }
+    },
+    'a': {
+      regex: $locale.DATETIME_FORMATS.AMPMS.join('|'),
+      apply: function(value) {
+        if (this.hours === 12) {
+          this.hours = 0;
+        }
+
+        if (value === 'PM') {
+          this.hours += 12;
+        }
+      }
     }
   };
 
diff --git a/src/dateparser/test/dateparser.spec.js b/src/dateparser/test/dateparser.spec.js
index 37c2bc972a..5c10a1df29 100644
--- a/src/dateparser/test/dateparser.spec.js
+++ b/src/dateparser/test/dateparser.spec.js
@@ -68,6 +68,16 @@ describe('date parser', function () {
       expectParse('11-08-13 23', 'd-MM-yy HH', new Date(2013, 7, 11, 23));
     });
 
+    it('should work correctly for `hh`', function() {
+      expectParse('22.March.15.22', 'd.MMMM.yy.hh', undefined);
+      expectParse('22.March.15.12', 'd.MMMM.yy.hh', new Date(2015, 2, 22, 12));
+      expectParse('8-March-1991-11', 'd-MMMM-yyyy-HH', new Date(1991, 2, 8, 11));
+      expectParse('February/5/1980/00', 'MMMM/d/yyyy/hh', new Date(1980, 1, 5, 0));
+      expectParse('1955/February/5 03', 'yyyy/MMMM/d hh', new Date(1955, 1, 5, 3));
+      expectParse('11-08-13 23', 'd-MM-yy hh', undefined);
+      expectParse('11-08-13 09', 'd-MM-yy hh', new Date(2013, 7, 11, 9));
+    });
+
     it('should work correctly for `H`', function() {
       expectParse('22.March.15.22', 'd.MMMM.yy.H', new Date(2015, 2, 22, 22));
       expectParse('8-March-1991-11', 'd-MMMM-yyyy-H', new Date(1991, 2, 8, 11));
@@ -125,6 +135,19 @@ describe('date parser', function () {
       expectParse('22.March.15.22:33:4', 'd.MMMM.yy.HH:mm:s', new Date(2015, 2, 22, 22, 33, 4));
       expectParse('22.March.15.22:3:4', 'd.MMMM.yy.HH:m:s', new Date(2015, 2, 22, 22, 3, 4));
     });
+
+    it('should work correctly for `a`', function() {
+      expectParse('22.March.15.10AM', 'd.MMMM.yy.hha', new Date(2015, 2, 22, 10));
+      expectParse('22.March.15.10PM', 'd.MMMM.yy.hha', new Date(2015, 2, 22, 22));
+      expectParse('8-March-1991-11AM', 'd-MMMM-yyyy-hha', new Date(1991, 2, 8, 11));
+      expectParse('8-March-1991-11PM', 'd-MMMM-yyyy-hha', new Date(1991, 2, 8, 23));
+      expectParse('February/5/1980/12AM', 'MMMM/d/yyyy/hha', new Date(1980, 1, 5, 0));
+      expectParse('February/5/1980/12PM', 'MMMM/d/yyyy/hha', new Date(1980, 1, 5, 12));
+      expectParse('1955/February/5 03AM', 'yyyy/MMMM/d hha', new Date(1955, 1, 5, 3));
+      expectParse('1955/February/5 03PM', 'yyyy/MMMM/d hha', new Date(1955, 1, 5, 15));
+      expectParse('11-08-13 09AM', 'd-MM-yy hha', new Date(2013, 7, 11, 9));
+      expectParse('11-08-13 09PM', 'd-MM-yy hha', new Date(2013, 7, 11, 21));
+    });
   });
 
   describe('with predefined formats', function() {