diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/AcceptanceTests/acceptanceTests.ts b/AutoRest/Generators/NodeJS/NodeJS.Tests/AcceptanceTests/acceptanceTests.ts
index 0a81b3420068..53e027b7e9a6 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/AcceptanceTests/acceptanceTests.ts
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/AcceptanceTests/acceptanceTests.ts
@@ -199,6 +199,29 @@ describe('nodejs', function () {
           });
         });
       });
+
+      it('should put and get UnixTime date correctly', function (done) {
+        var d = new Date(2016, 3, 12, 17, 0, 0);
+        testClient.intModel.putUnixTimeDate(d, function (error, result) {
+          should.not.exist(error);
+          testClient.intModel.getUnixTime(function (error, result) {
+            should.not.exist(error);
+            assert.deepEqual(result, d);
+            done();
+          });
+        });
+      });
+
+      it('should throw an error for invalid UnixTime date anf get null value for UnixTime', function (done) {
+        testClient.intModel.getInvalidUnixTime(function (error, result) {
+          should.exist(error);
+          testClient.intModel.getNullUnixTime(function (error, result) {
+            should.not.exist(error);
+            should.not.exist(result);
+            done();
+          });
+        });
+      });
     });
 
     describe('CompositeBoolInt Client', function () {
@@ -1891,6 +1914,13 @@ describe('nodejs', function () {
         });
       });
 
+      it('should work when path has a paramaeter in UnixTime format', function (done) {
+        testClient.paths.unixTimeUrl(new Date(2016, 3, 12, 17, 0, 0), function (error, result) {
+          should.not.exist(error);
+          done();
+        });
+      });
+
       it('should work when path has datetime', function (done) {
         testClient.paths.dateTimeValid(new Date('2012-01-01T01:01:01Z'), function (error, result) {
           should.not.exist(error);
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/index.d.ts b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/index.d.ts
index 1b00b43d8142..6fddcb9d0675 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/index.d.ts
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/index.d.ts
@@ -179,13 +179,13 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getUnixTime(callback: ServiceCallback<number>): void;
+    getUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getUnixTime(callback: ServiceCallback<Date>): void;
 
     /**
      * Put datetime encoded as Unix time
      *
-     * @param {number} intBody
+     * @param {date} intBody
      * 
      * @param {object} [options] Optional Parameters.
      * 
@@ -195,8 +195,8 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    putUnixTimeDate(intBody: number, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
-    putUnixTimeDate(intBody: number, callback: ServiceCallback<void>): void;
+    putUnixTimeDate(intBody: Date, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
+    putUnixTimeDate(intBody: Date, callback: ServiceCallback<void>): void;
 
     /**
      * Get invalid Unix time value
@@ -209,8 +209,8 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getInvalidUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getInvalidUnixTime(callback: ServiceCallback<number>): void;
+    getInvalidUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getInvalidUnixTime(callback: ServiceCallback<Date>): void;
 
     /**
      * Get null Unix time value
@@ -223,6 +223,6 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getNullUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getNullUnixTime(callback: ServiceCallback<number>): void;
+    getNullUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getNullUnixTime(callback: ServiceCallback<Date>): void;
 }
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/intModel.js b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/intModel.js
index b1ed3fbf470c..290a93e9b35e 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/intModel.js
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/BodyInteger/operations/intModel.js
@@ -1210,7 +1210,7 @@ IntModel.prototype.putMin64 = function (intBody, options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1293,7 +1293,7 @@ IntModel.prototype.getUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
@@ -1313,7 +1313,7 @@ IntModel.prototype.getUnixTime = function (options, callback) {
 /**
  * Put datetime encoded as Unix time
  *
- * @param {number} intBody
+ * @param {date} intBody
  * 
  * @param {object} [options] Optional Parameters.
  * 
@@ -1343,9 +1343,10 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
   }
   // Validate
   try {
-    if (intBody === null || intBody === undefined || typeof intBody !== 'number') {
-      throw new Error('intBody cannot be null or undefined and it must be of type number.');
-    }
+    if(!intBody || !(intBody instanceof Date || 
+        (typeof intBody.valueOf() === 'string' && !isNaN(Date.parse(intBody))))) {
+          throw new Error('intBody cannot be null or undefined and it must be of type date.');
+        }
   } catch (error) {
     return callback(error);
   }
@@ -1380,7 +1381,7 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
         required: true,
         serializedName: 'intBody',
         type: {
-          name: 'Number'
+          name: 'UnixTime'
         }
       };
       requestModel = client.serialize(requestModelMapper, intBody, 'intBody');
@@ -1445,7 +1446,7 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1528,7 +1529,7 @@ IntModel.prototype.getInvalidUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
@@ -1559,7 +1560,7 @@ IntModel.prototype.getInvalidUnixTime = function (options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1642,7 +1643,7 @@ IntModel.prototype.getNullUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/index.d.ts b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/index.d.ts
index ac60442293cc..507488a58f3f 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/index.d.ts
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/index.d.ts
@@ -276,13 +276,13 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getUnixTime(callback: ServiceCallback<number>): void;
+    getUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getUnixTime(callback: ServiceCallback<Date>): void;
 
     /**
      * Put datetime encoded as Unix time
      *
-     * @param {number} intBody
+     * @param {date} intBody
      * 
      * @param {object} [options] Optional Parameters.
      * 
@@ -292,8 +292,8 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    putUnixTimeDate(intBody: number, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
-    putUnixTimeDate(intBody: number, callback: ServiceCallback<void>): void;
+    putUnixTimeDate(intBody: Date, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
+    putUnixTimeDate(intBody: Date, callback: ServiceCallback<void>): void;
 
     /**
      * Get invalid Unix time value
@@ -306,8 +306,8 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getInvalidUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getInvalidUnixTime(callback: ServiceCallback<number>): void;
+    getInvalidUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getInvalidUnixTime(callback: ServiceCallback<Date>): void;
 
     /**
      * Get null Unix time value
@@ -320,6 +320,6 @@ export interface IntModel {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    getNullUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<number>): void;
-    getNullUnixTime(callback: ServiceCallback<number>): void;
+    getNullUnixTime(options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<Date>): void;
+    getNullUnixTime(callback: ServiceCallback<Date>): void;
 }
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/intModel.js b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/intModel.js
index 42f1d72ab3f7..d00f8cb625a0 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/intModel.js
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/CompositeBoolIntClient/operations/intModel.js
@@ -1210,7 +1210,7 @@ IntModel.prototype.putMin64 = function (intBody, options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1293,7 +1293,7 @@ IntModel.prototype.getUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
@@ -1313,7 +1313,7 @@ IntModel.prototype.getUnixTime = function (options, callback) {
 /**
  * Put datetime encoded as Unix time
  *
- * @param {number} intBody
+ * @param {date} intBody
  * 
  * @param {object} [options] Optional Parameters.
  * 
@@ -1343,9 +1343,10 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
   }
   // Validate
   try {
-    if (intBody === null || intBody === undefined || typeof intBody !== 'number') {
-      throw new Error('intBody cannot be null or undefined and it must be of type number.');
-    }
+    if(!intBody || !(intBody instanceof Date || 
+        (typeof intBody.valueOf() === 'string' && !isNaN(Date.parse(intBody))))) {
+          throw new Error('intBody cannot be null or undefined and it must be of type date.');
+        }
   } catch (error) {
     return callback(error);
   }
@@ -1380,7 +1381,7 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
         required: true,
         serializedName: 'intBody',
         type: {
-          name: 'Number'
+          name: 'UnixTime'
         }
       };
       requestModel = client.serialize(requestModelMapper, intBody, 'intBody');
@@ -1445,7 +1446,7 @@ IntModel.prototype.putUnixTimeDate = function (intBody, options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1528,7 +1529,7 @@ IntModel.prototype.getInvalidUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
@@ -1559,7 +1560,7 @@ IntModel.prototype.getInvalidUnixTime = function (options, callback) {
  *
  *                      {Error}  err        - The Error object if an error occurred, null otherwise.
  *
- *                      {number} [result]   - The deserialized result object.
+ *                      {date} [result]   - The deserialized result object.
  *
  *                      {object} [request]  - The HTTP Request object if an error did not occur.
  *
@@ -1642,7 +1643,7 @@ IntModel.prototype.getNullUnixTime = function (options, callback) {
             required: false,
             serializedName: 'parsedResponse',
             type: {
-              name: 'Number'
+              name: 'UnixTime'
             }
           };
           result = client.deserialize(resultMapper, parsedResponse, 'result');
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/index.d.ts b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/index.d.ts
index 3f5e24643883..36fd5ba34f31 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/index.d.ts
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/index.d.ts
@@ -398,7 +398,7 @@ export interface Paths {
     /**
      * Get the date 2016-04-13 encoded value as '1460505600' (Unix time)
      *
-     * @param {number} unixTimeUrlPath Unix time encoded value
+     * @param {date} unixTimeUrlPath Unix time encoded value
      * 
      * @param {object} [options] Optional Parameters.
      * 
@@ -408,8 +408,8 @@ export interface Paths {
      * @param {ServiceCallback} [callback] callback function; see ServiceCallback
      * doc in ms-rest index.d.ts for details
      */
-    unixTimeUrl(unixTimeUrlPath: number, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
-    unixTimeUrl(unixTimeUrlPath: number, callback: ServiceCallback<void>): void;
+    unixTimeUrl(unixTimeUrlPath: Date, options: { customHeaders? : { [headerName: string]: string; } }, callback: ServiceCallback<void>): void;
+    unixTimeUrl(unixTimeUrlPath: Date, callback: ServiceCallback<void>): void;
 }
 
 /**
diff --git a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/paths.js b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/paths.js
index 4039b0ce9664..2b5ff16d6bf6 100644
--- a/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/paths.js
+++ b/AutoRest/Generators/NodeJS/NodeJS.Tests/Expected/AcceptanceTests/Url/operations/paths.js
@@ -2461,7 +2461,7 @@ Paths.prototype.arrayCsvInPath = function (arrayPath, options, callback) {
 /**
  * Get the date 2016-04-13 encoded value as '1460505600' (Unix time)
  *
- * @param {number} unixTimeUrlPath Unix time encoded value
+ * @param {date} unixTimeUrlPath Unix time encoded value
  * 
  * @param {object} [options] Optional Parameters.
  * 
@@ -2491,9 +2491,10 @@ Paths.prototype.unixTimeUrl = function (unixTimeUrlPath, options, callback) {
   }
   // Validate
   try {
-    if (unixTimeUrlPath === null || unixTimeUrlPath === undefined || typeof unixTimeUrlPath !== 'number') {
-      throw new Error('unixTimeUrlPath cannot be null or undefined and it must be of type number.');
-    }
+    if(!unixTimeUrlPath || !(unixTimeUrlPath instanceof Date || 
+        (typeof unixTimeUrlPath.valueOf() === 'string' && !isNaN(Date.parse(unixTimeUrlPath))))) {
+          throw new Error('unixTimeUrlPath cannot be null or undefined and it must be of type date.');
+        }
   } catch (error) {
     return callback(error);
   }
@@ -2501,7 +2502,7 @@ Paths.prototype.unixTimeUrl = function (unixTimeUrlPath, options, callback) {
   // Construct URL
   var requestUrl = this.client.baseUri +
                    '//paths/int/1460505600/{unixTimeUrlPath}';
-  requestUrl = requestUrl.replace('{unixTimeUrlPath}', encodeURIComponent(unixTimeUrlPath.toString()));
+  requestUrl = requestUrl.replace('{unixTimeUrlPath}', encodeURIComponent(client.serialize({required: true, serializedName: 'unixTimeUrlPath', type: {name: 'UnixTime'}}, unixTimeUrlPath, 'unixTimeUrlPath')));
   // trim all duplicate forward slashes in the url
   var regex = /([^:]\/)\/+/gi;
   requestUrl = requestUrl.replace(regex, '$1');
diff --git a/AutoRest/Generators/NodeJS/NodeJS/ClientModelExtensions.cs b/AutoRest/Generators/NodeJS/NodeJS/ClientModelExtensions.cs
index 8f36adeec874..ba3a24c17bf8 100644
--- a/AutoRest/Generators/NodeJS/NodeJS/ClientModelExtensions.cs
+++ b/AutoRest/Generators/NodeJS/NodeJS/ClientModelExtensions.cs
@@ -131,6 +131,12 @@ public static string ToString(this IType type, string reference)
                     return string.Format(CultureInfo.InvariantCulture,
                         "client.serialize({{required: true, serializedName: '{0}', type: {{name: 'Base64Url'}}}}, {0}, '{0}')", reference);
                 }
+
+                if (known.Type == KnownPrimaryType.UnixTime)
+                {
+                    return string.Format(CultureInfo.InvariantCulture,
+                        "client.serialize({{required: true, serializedName: '{0}', type: {{name: 'UnixTime'}}}}, {0}, '{0}')", reference);
+                }
             }
 
             return string.Format(CultureInfo.InvariantCulture, "{0}.toString()", reference);
@@ -195,8 +201,7 @@ private static string ValidatePrimaryType(this PrimaryType primary, IScopeProvid
                 primary.Type == KnownPrimaryType.Decimal ||
                 primary.Type == KnownPrimaryType.Int ||
                 primary.Type == KnownPrimaryType.Long ||
-                primary.Type == KnownPrimaryType.Object || 
-                primary.Type == KnownPrimaryType.UnixTime)
+                primary.Type == KnownPrimaryType.Object)
             {
                 if (isRequired)
                 {
@@ -254,7 +259,8 @@ private static string ValidatePrimaryType(this PrimaryType primary, IScopeProvid
                 builder.AppendLine("if ({0} && !Buffer.isBuffer({0})) {{", valueReference, lowercaseTypeName);
                 return ConstructValidationCheck(builder, typeErrorMessage, valueReference, primary.Name).ToString();
             }
-            else if (primary.Type == KnownPrimaryType.DateTime || primary.Type == KnownPrimaryType.Date || primary.Type == KnownPrimaryType.DateTimeRfc1123)
+            else if (primary.Type == KnownPrimaryType.DateTime || primary.Type == KnownPrimaryType.Date || 
+                primary.Type == KnownPrimaryType.DateTimeRfc1123 || primary.Type == KnownPrimaryType.UnixTime)
             {
                 if (isRequired)
                 {
@@ -303,11 +309,13 @@ private static string PrimaryTSType(this PrimaryType primary)
 
             if (primary.Type == KnownPrimaryType.Boolean)
                 return "boolean";
-            else if (primary.Type == KnownPrimaryType.Double || primary.Type == KnownPrimaryType.Decimal || primary.Type == KnownPrimaryType.Int || primary.Type == KnownPrimaryType.Long || primary.Type == KnownPrimaryType.UnixTime)
+            else if (primary.Type == KnownPrimaryType.Double || primary.Type == KnownPrimaryType.Decimal || 
+                primary.Type == KnownPrimaryType.Int || primary.Type == KnownPrimaryType.Long)
                 return "number";
             else if (primary.Type == KnownPrimaryType.String || primary.Type == KnownPrimaryType.Uuid)
                 return "string";
-            else if (primary.Type == KnownPrimaryType.Date || primary.Type == KnownPrimaryType.DateTime || primary.Type == KnownPrimaryType.DateTimeRfc1123)
+            else if (primary.Type == KnownPrimaryType.Date || primary.Type == KnownPrimaryType.DateTime || 
+                primary.Type == KnownPrimaryType.DateTimeRfc1123 || primary.Type == KnownPrimaryType.UnixTime)
                 return "Date";
             else if (primary.Type == KnownPrimaryType.Object)
                 return "any";   // TODO: test this
@@ -747,8 +755,8 @@ public static string ConstructMapper(this IType type, string serializedName, IPa
                 {
                     builder.AppendLine("type: {").Indent().AppendLine("name: 'Boolean'").Outdent().AppendLine("}");
                 }
-                else if(primary.Type == KnownPrimaryType.Int || primary.Type == KnownPrimaryType.Long || primary.Type == KnownPrimaryType.Decimal || 
-                    primary.Type == KnownPrimaryType.Double || primary.Type == KnownPrimaryType.UnixTime)
+                else if (primary.Type == KnownPrimaryType.Int || primary.Type == KnownPrimaryType.Long ||
+                    primary.Type == KnownPrimaryType.Decimal || primary.Type == KnownPrimaryType.Double)
                 {
                     builder.AppendLine("type: {").Indent().AppendLine("name: 'Number'").Outdent().AppendLine("}");
                 }
@@ -784,6 +792,10 @@ public static string ConstructMapper(this IType type, string serializedName, IPa
                 {
                     builder.AppendLine("type: {").Indent().AppendLine("name: 'TimeSpan'").Outdent().AppendLine("}");
                 }
+                else if (primary.Type == KnownPrimaryType.UnixTime)
+                {
+                    builder.AppendLine("type: {").Indent().AppendLine("name: 'UnixTime'").Outdent().AppendLine("}");
+                }
                 else if (primary.Type == KnownPrimaryType.Object)
                 {
                     builder.AppendLine("type: {").Indent().AppendLine("name: 'Object'").Outdent().AppendLine("}");
diff --git a/AutoRest/Generators/NodeJS/NodeJS/NodeJsCodeNamer.cs b/AutoRest/Generators/NodeJS/NodeJS/NodeJsCodeNamer.cs
index d2f43a402f58..2dc7c2f0edd6 100644
--- a/AutoRest/Generators/NodeJS/NodeJS/NodeJsCodeNamer.cs
+++ b/AutoRest/Generators/NodeJS/NodeJS/NodeJsCodeNamer.cs
@@ -365,6 +365,10 @@ private static IType NormalizePrimaryType(PrimaryType primaryType)
             {
                 primaryType.Name = "Date";
             }
+            else if (primaryType.Type == KnownPrimaryType.UnixTime)
+            {
+                primaryType.Name = "Date";
+            }
             else if (primaryType.Type == KnownPrimaryType.Double)
             {
                 primaryType.Name = "Number";
@@ -393,10 +397,6 @@ private static IType NormalizePrimaryType(PrimaryType primaryType)
             {
                 primaryType.Name = "moment.duration"; 
             }
-            else if (primaryType.Type == KnownPrimaryType.UnixTime)
-            {
-                primaryType.Name = "Number";
-            }
             else if (primaryType.Type == KnownPrimaryType.Uuid)
             {
                 primaryType.Name = "Uuid";
diff --git a/ClientRuntimes/NodeJS/ms-rest/lib/serialization.js b/ClientRuntimes/NodeJS/ms-rest/lib/serialization.js
index de8d0778efd9..f802dd43841f 100644
--- a/ClientRuntimes/NodeJS/ms-rest/lib/serialization.js
+++ b/ClientRuntimes/NodeJS/ms-rest/lib/serialization.js
@@ -74,7 +74,7 @@ exports.serialize = function (mapper, object, objectName) {
     payload = serializeBasicTypes.call(this, mapperType, objectName, object);
   } else if (mapperType.match(/^Enum$/ig) !== null) {
     payload = serializeEnumType.call(this, objectName, mapper.type.allowedValues, object);
-  } else if (mapperType.match(/^(Date|DateTime|TimeSpan|DateTimeRfc1123)$/ig) !== null) {
+  } else if (mapperType.match(/^(Date|DateTime|TimeSpan|DateTimeRfc1123|UnixTime)$/ig) !== null) {
     payload = serializeDateTypes.call(this, mapperType, object, objectName);
   } else if (mapperType.match(/^ByteArray$/ig) !== null) {
     payload = serializeBufferType.call(this, objectName, object);
@@ -370,6 +370,13 @@ function serializeDateTypes(typeName, value, objectName) {
         throw new Error(util.format('%s must be an instanceof Date or a string in RFC-1123 format.', objectName));
       }
       value = (value instanceof Date) ? value.toUTCString() :  new Date(value).toUTCString();
+    } else if (typeName.match(/^UnixTime$/ig) !== null) {
+      if (!(value instanceof Date || 
+        (typeof value.valueOf() === 'string' && !isNaN(Date.parse(value))))) {
+        throw new Error(util.format('%s must be an instanceof Date or a string in RFC-1123/ISO8601 format ' + 
+          'for it to be serialized in UnixTime/Epoch format.', objectName));
+      }
+      value = dateToUnixTime(value);
     } else if (typeName.match(/^TimeSpan$/ig) !== null) {
       if (!moment.isDuration(value)) {
         throw new Error(util.format('%s must be a TimeSpan/Duration.', objectName));
@@ -402,8 +409,10 @@ exports.deserialize = function (mapper, responseBody, objectName) {
     payload = responseBody;
   } else if (mapperType.match(/^(Date|DateTime|DateTimeRfc1123)$/ig) !== null) {
     payload = new Date(responseBody);
-  } else if (mapperType.match(/^(TimeSpan)$/ig) !== null) {
+  } else if (mapperType.match(/^TimeSpan$/ig) !== null) {
     payload = moment.duration(responseBody);
+  } else if (mapperType.match(/^UnixTime$/ig) !== null) {
+    payload = unixTimeToDate(responseBody);
   } else if (mapperType.match(/^ByteArray$/ig) !== null) {
     payload = new Buffer(responseBody, 'base64');
   } else if (mapperType.match(/^Base64Url$/ig) !== null) {
@@ -595,4 +604,23 @@ function base64UrlToBuffer(str) {
   return new Buffer(str, 'base64');
 }
 
+function dateToUnixTime(d) {
+  if (!d) {
+    return null;
+  }
+  // A Date can be converted to string in JSON-clone operations, so let's tolerate.
+  if (typeof d.valueOf() === 'string') {
+    d = new Date(d);
+  }
+  var foo = parseInt(d.getTime() / 1000);
+  return foo;
+}
+
+function unixTimeToDate(n) {
+  if (!n) {
+    return null;
+  }
+  return new Date(n*1000);
+}
+
 exports = module.exports;
\ No newline at end of file