Add date flag to filters to be allow columsn to be filtered by dates.

src/js/core/services/rowSearcher.js

@@ -134,7 +134,7 @@ module.service('rowSearcher', ['gridUtil', 'uiGridConstants', function (gridUtil
           newFilter.condition = rowSearcher.guessCondition(filter);
         }
 
-        newFilter.flags = angular.extend( { caseSensitive: false }, filter.flags );
+        newFilter.flags = angular.extend( { caseSensitive: false, date: false }, filter.flags );
 
         if (newFilter.condition === uiGridConstants.filter.STARTS_WITH) {
           newFilter.startswithRE = new RegExp('^' + newFilter.term, regexpFlags);
@@ -221,6 +221,12 @@ module.service('rowSearcher', ['gridUtil', 'uiGridConstants', function (gridUtil
       }
     }
 
+    if (filter.flags.date === true) {
+      value = new Date(value);
+      // If the term has a dash in it, it comes through as '\-' -- we need to take out the '\'.
+      term = new Date(term.replace(/\\/g, ''));
+    }
+
     if (filter.condition === uiGridConstants.filter.GREATER_THAN) {
       return (value > term);
     }

test/unit/core/services/rowSearcher.spec.js

@@ -0,0 +1,40 @@
+describe('rowSearcher', function() {
+  var rowSearcher,
+    uiGridConstants;
+
+  beforeEach(module('ui.grid'));
+
+  beforeEach(inject(function(_rowSearcher_, _uiGridConstants_) {
+    rowSearcher = _rowSearcher_;
+    uiGridConstants = _uiGridConstants_;
+  }));
+
+  describe('runColumnFilter', function() {
+    it('should be able to compare dates', function() {
+      var grid = {
+        getCellValue: function() {
+          return '2015-05-23';
+        }
+      };
+
+      var filter = {
+        term: '2015-05-24',
+        flags: { date: true },
+        condition: uiGridConstants.filter.GREATER_THAN
+      };
+      expect(rowSearcher.runColumnFilter(grid, 1, 2, filter)).toBe(false);
+
+      filter.term = '2015-05-22';
+      filter.condition = uiGridConstants.filter.GREATER_THAN;
+      expect(rowSearcher.runColumnFilter(grid, 1, 2, filter)).toBe(true);
+
+      filter.term = '2015-05-24';
+      filter.condition = uiGridConstants.filter.GREATER_THAN;
+      expect(rowSearcher.runColumnFilter(grid, 1, 2, filter)).toBe(false);
+
+      filter.term = '2015-05-23';
+      filter.condition = uiGridConstants.filter.GREATER_THAN_OR_EQUAL_TO;
+      expect(rowSearcher.runColumnFilter(grid, 1, 2, filter)).toBe(true);
+    });
+  });
+});