diff --git a/src/Umbraco.Core/DateTimeExtensions.cs b/src/Umbraco.Core/DateTimeExtensions.cs
new file mode 100644
index 0000000000..74460814b3
--- /dev/null
+++ b/src/Umbraco.Core/DateTimeExtensions.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Umbraco.Core
+{
+    public static class DateTimeExtensions
+    {
+
+        /// <summary>
+        /// Returns the DateTime as an ISO formatted string that is globally expectable
+        /// </summary>
+        /// <param name="dt"></param>
+        /// <returns></returns>
+        public static string ToIsoString(this DateTime dt)
+        {
+            return dt.ToString("yyyy-MM-dd HH:mm:ss");
+        }
+
+    }
+}
diff --git a/src/Umbraco.Core/Persistence/Querying/ModelToSqlExpressionHelper.cs b/src/Umbraco.Core/Persistence/Querying/ModelToSqlExpressionHelper.cs
index 7a65fe33bc..470a098fd8 100644
--- a/src/Umbraco.Core/Persistence/Querying/ModelToSqlExpressionHelper.cs
+++ b/src/Umbraco.Core/Persistence/Querying/ModelToSqlExpressionHelper.cs
@@ -455,8 +455,11 @@ namespace Umbraco.Core.Persistence.Querying
             if (fieldType == typeof(decimal))
                 return ((decimal)value).ToString(CultureInfo.InvariantCulture);
 
-            if (fieldType == typeof(DateTime))
-                return "'" + EscapeParam(((DateTime)value).ToString(CultureInfo.InvariantCulture)) + "'";
+            if (fieldType == typeof (DateTime))
+            {
+                return "'" + EscapeParam(((DateTime)value).ToIsoString()) + "'";
+            }
+                
             
             if (fieldType == typeof(bool))
                 return ((bool)value) ? Convert.ToString(1, CultureInfo.InvariantCulture) : Convert.ToString(0, CultureInfo.InvariantCulture);
diff --git a/src/Umbraco.Core/Persistence/Querying/PocoToSqlExpressionHelper.cs b/src/Umbraco.Core/Persistence/Querying/PocoToSqlExpressionHelper.cs
index 456607a348..d065849102 100644
--- a/src/Umbraco.Core/Persistence/Querying/PocoToSqlExpressionHelper.cs
+++ b/src/Umbraco.Core/Persistence/Querying/PocoToSqlExpressionHelper.cs
@@ -465,8 +465,11 @@ namespace Umbraco.Core.Persistence.Querying
             if (fieldType == typeof(decimal))
                 return ((decimal)value).ToString(CultureInfo.InvariantCulture);
 
-            if(fieldType == typeof(DateTime))
-                return "'" + EscapeParam(((DateTime)value).ToString(CultureInfo.InvariantCulture)) + "'";
+            if (fieldType == typeof (DateTime))
+            {
+                return "'" + EscapeParam(((DateTime)value).ToIsoString()) + "'";
+            }
+                
 
             if (fieldType == typeof(bool))
                 return ((bool)value) ? Convert.ToString(1, CultureInfo.InvariantCulture) : Convert.ToString(0, CultureInfo.InvariantCulture);
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index ccc361e3f7..1c8fff3334 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -140,6 +140,7 @@
     <Compile Include="CoreBootManager.cs" />
     <Compile Include="DatabaseContext.cs" />
     <Compile Include="DataTableExtensions.cs" />
+    <Compile Include="DateTimeExtensions.cs" />
     <Compile Include="DictionaryExtensions.cs" />
     <Compile Include="Dictionary\CultureDictionaryFactoryResolver.cs" />
     <Compile Include="Dictionary\ICultureDictionaryFactory.cs" />
diff --git a/src/Umbraco.Tests/Persistence/Querying/QueryBuilderTests.cs b/src/Umbraco.Tests/Persistence/Querying/QueryBuilderTests.cs
index 5823970874..25fc2c3d35 100644
--- a/src/Umbraco.Tests/Persistence/Querying/QueryBuilderTests.cs
+++ b/src/Umbraco.Tests/Persistence/Querying/QueryBuilderTests.cs
@@ -12,6 +12,22 @@ namespace Umbraco.Tests.Persistence.Querying
     [TestFixture]
     public class QueryBuilderTests : BaseUsingSqlCeSyntax
     {
+        [Test]
+        public void Dates_Formatted_Properly()
+        {
+            var sql = new Sql();
+            sql.Select("*").From<DocumentDto>();
+
+            var dt = new DateTime(2013, 11, 21, 13, 25, 55);
+
+            var query = Query<IContent>.Builder.Where(x => x.ExpireDate <= dt);
+            var translator = new SqlTranslator<IContent>(sql, query);
+
+            var result = translator.Translate();
+
+            Assert.IsTrue(result.SQL.Contains("[expireDate] <= '2013-11-21 13:25:55'"));
+        }
+
         [Test]
         public void Can_Build_StartsWith_Query_For_IContent()
         {