diff --git a/src/ol/parser/ogc/filter_v1.js b/src/ol/parser/ogc/filter_v1.js
index 72ba5453fd..1deca301fa 100644
--- a/src/ol/parser/ogc/filter_v1.js
+++ b/src/ol/parser/ogc/filter_v1.js
@@ -346,12 +346,8 @@ ol.parser.ogc.Filter_v1 = function() {
       },
       'Literal': function(expr) {
         goog.asserts.assert(expr instanceof ol.expr.Literal);
-        var value = expr.getValue();
-        if (value instanceof Date) {
-          value = value.toISOString();
-        }
         var node = this.createElementNS('ogc:Literal');
-        node.appendChild(this.createTextNode(value));
+        node.appendChild(this.createTextNode(expr.getValue()));
         return node;
       },
       'LowerBoundary': function(expr) {
diff --git a/test/spec/ol/parser/ogc/filter_v1_0_0.test.js b/test/spec/ol/parser/ogc/filter_v1_0_0.test.js
index e3cb981bc6..3fb30a9486 100644
--- a/test/spec/ol/parser/ogc/filter_v1_0_0.test.js
+++ b/test/spec/ol/parser/ogc/filter_v1_0_0.test.js
@@ -234,28 +234,6 @@ describe('ol.parser.ogc.Filter_v1_0_0', function() {
 
   });
 
-  describe('#date', function() {
-
-    it('date writing works as expected', function(done) {
-      var url = 'spec/ol/parser/ogc/xml/filter_v1_0_0/betweendates.xml';
-      afterLoadXml(url, function(xml) {
-        // ISO 8601: 2010-11-27T18:19:15.123Z
-        var start = new Date(Date.UTC(2010, 10, 27, 18, 19, 15, 123));
-        // ISO 8601: 2011-12-27T18:19:15.123Z
-        var end = new Date(Date.UTC(2011, 11, 27, 18, 19, 15, 123));
-        var filter = new ol.expr.Logical(ol.expr.LogicalOp.AND,
-            new ol.expr.Comparison(ol.expr.ComparisonOp.GTE,
-            new ol.expr.Identifier('when'), new ol.expr.Literal(start)),
-            new ol.expr.Comparison(ol.expr.ComparisonOp.LTE,
-            new ol.expr.Identifier('when'), new ol.expr.Literal(end)));
-        var output = parser.write(filter);
-        expect(goog.dom.xml.loadXml(output)).to.xmleql(xml);
-        done();
-      });
-    });
-
-  });
-
   describe('_expression reader works as expected', function() {
     it('_expression reader handles combined propertyname and literal',
         function() {
diff --git a/test/spec/ol/parser/ogc/xml/filter_v1_0_0/betweendates.xml b/test/spec/ol/parser/ogc/xml/filter_v1_0_0/betweendates.xml
deleted file mode 100644
index 3ad5b0131e..0000000000
--- a/test/spec/ol/parser/ogc/xml/filter_v1_0_0/betweendates.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<ogc:Filter xmlns:ogc="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/ogc http://schemas.opengis.net/filter/1.0.0/filter.xsd">
-    <ogc:PropertyIsBetween>
-        <ogc:PropertyName>when</ogc:PropertyName>
-        <ogc:LowerBoundary>
-            <ogc:Literal>2010-11-27T18:19:15.123Z</ogc:Literal>
-        </ogc:LowerBoundary>
-        <ogc:UpperBoundary>
-            <ogc:Literal>2011-12-27T18:19:15.123Z</ogc:Literal>
-        </ogc:UpperBoundary>
-    </ogc:PropertyIsBetween>
-</ogc:Filter>
diff --git a/test/spec/ol/parser/ogc/xml/filter_v1_0_0/custombetweendates.xml b/test/spec/ol/parser/ogc/xml/filter_v1_0_0/custombetweendates.xml
deleted file mode 100644
index f12024a9dd..0000000000
--- a/test/spec/ol/parser/ogc/xml/filter_v1_0_0/custombetweendates.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
-    <ogc:PropertyIsBetween>
-        <ogc:PropertyName>when</ogc:PropertyName>
-        <ogc:LowerBoundary>
-            <ogc:Literal>2010-11-27</ogc:Literal>
-        </ogc:LowerBoundary>
-        <ogc:UpperBoundary>
-            <ogc:Literal>2011-12-27</ogc:Literal>
-        </ogc:UpperBoundary>
-    </ogc:PropertyIsBetween>
-</ogc:Filter>