diff --git a/common/lib/xmodule/xmodule/discussion_module.py b/common/lib/xmodule/xmodule/discussion_module.py
index 8051cb23a3..86dd2fddee 100644
--- a/common/lib/xmodule/xmodule/discussion_module.py
+++ b/common/lib/xmodule/xmodule/discussion_module.py
@@ -36,10 +36,14 @@ class DiscussionFields(object):
 
 
 class DiscussionModule(DiscussionFields, XModule):
-    js = {'coffee':
-          [resource_string(__name__, 'js/src/time.coffee'),
-          resource_string(__name__, 'js/src/discussion/display.coffee')]
-          }
+    js = {
+        'coffee': [
+            resource_string(__name__, 'js/src/discussion/display.coffee')
+        ],
+        'js': [
+            resource_string(__name__, 'js/src/time.js')
+        ]
+    }
     js_module_name = "InlineDiscussion"
 
     def get_html(self):
diff --git a/common/lib/xmodule/xmodule/js/spec/.gitignore b/common/lib/xmodule/xmodule/js/spec/.gitignore
index 138742c14c..0f9afc716a 100644
--- a/common/lib/xmodule/xmodule/js/spec/.gitignore
+++ b/common/lib/xmodule/xmodule/js/spec/.gitignore
@@ -2,3 +2,6 @@
 
 # Tests for video are written in pure JavaScript.
 !video/*.js
+
+# Tests for Time are written in pure JavaScript.
+!time_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/time_spec.coffee b/common/lib/xmodule/xmodule/js/spec/time_spec.coffee
deleted file mode 100644
index 80891d58b5..0000000000
--- a/common/lib/xmodule/xmodule/js/spec/time_spec.coffee
+++ /dev/null
@@ -1,18 +0,0 @@
-describe 'Time', ->
-  describe 'format', ->
-    describe 'with duration more than or equal to 1 hour', ->
-      it 'return a correct time format', ->
-        expect(Time.format(3600)).toEqual '1:00:00'
-        expect(Time.format(7272)).toEqual '2:01:12'
-
-    describe 'with duration less than 1 hour', ->
-      it 'return a correct time format', ->
-        expect(Time.format(1)).toEqual '0:01'
-        expect(Time.format(61)).toEqual '1:01'
-        expect(Time.format(3599)).toEqual '59:59'
-
-  describe 'convert', ->
-    it 'return a correct time based on speed modifier', ->
-      expect(Time.convert(0, 1, 1.5)).toEqual '0.000'
-      expect(Time.convert(100, 1, 1.5)).toEqual '66.667'
-      expect(Time.convert(100, 1.5, 1)).toEqual '150.000'
diff --git a/common/lib/xmodule/xmodule/js/spec/time_spec.js b/common/lib/xmodule/xmodule/js/spec/time_spec.js
new file mode 100644
index 0000000000..55a98ebb72
--- /dev/null
+++ b/common/lib/xmodule/xmodule/js/spec/time_spec.js
@@ -0,0 +1,50 @@
+(function (undefined) {
+    'use strict';
+
+    describe('Time', function () {
+        describe('format', function () {
+            describe('with duration more than or equal to 1 hour', function () {
+                it('return a correct time format', function () {
+                    expect(Time.format(3600)).toEqual('1:00:00');
+                    expect(Time.format(7272)).toEqual('2:01:12');
+                });
+            });
+
+            describe('with duration less than 1 hour', function () {
+                it('return a correct time format', function () {
+                    expect(Time.format(1)).toEqual('0:01');
+                    expect(Time.format(61)).toEqual('1:01');
+                    expect(Time.format(3599)).toEqual('59:59');
+                });
+            });
+        });
+
+        describe('formatFull', function () {
+            it('gives correct string for times', function () {
+                var testTimes = [
+                    [0,      '00:00:00'], [60,     '00:01:00'],
+                    [488,    '00:08:08'], [2452,   '00:40:52'],
+                    [3600,   '01:00:00'], [28800,  '08:00:00'],
+                    [144532, '40:08:52'], [190360, '52:52:40'],
+                    [294008, '81:40:08']
+                ];
+
+                $.each(testTimes, function (index, times) {
+                    var timeInt = times[0],
+                        timeStr = times[1];
+
+                    expect(Time.formatFull(timeInt)).toBe(timeStr);
+                });
+            });
+        });
+
+        describe('convert', function () {
+            it('return a correct time based on speed modifier', function () {
+                expect(Time.convert(0, 1, 1.5)).toEqual('0.000');
+                expect(Time.convert(100, 1, 1.5)).toEqual('66.667');
+                expect(Time.convert(100, 1.5, 1)).toEqual('150.000');
+            });
+        });
+    });
+
+}).call(this);
diff --git a/common/lib/xmodule/xmodule/js/src/.gitignore b/common/lib/xmodule/xmodule/js/src/.gitignore
index 54af6653e9..73a4527726 100644
--- a/common/lib/xmodule/xmodule/js/src/.gitignore
+++ b/common/lib/xmodule/xmodule/js/src/.gitignore
@@ -6,4 +6,8 @@
 
 # Video are written in pure JavaScript.
 !video/*.js
-!video/transcripts/*.js
\ No newline at end of file
+!video/transcripts/*.js
+
+
+# Converted to JS from CoffeeScript.
+!time.js
diff --git a/common/lib/xmodule/xmodule/js/src/time.coffee b/common/lib/xmodule/xmodule/js/src/time.coffee
deleted file mode 100644
index e2da2c583d..0000000000
--- a/common/lib/xmodule/xmodule/js/src/time.coffee
+++ /dev/null
@@ -1,30 +0,0 @@
-class @Time
-  @format: (time) ->
-    pad = (number) -> if number < 10 then  "0#{number}" else number
-
-    seconds = Math.floor time
-    minutes = Math.floor seconds / 60
-    hours = Math.floor minutes / 60
-    seconds = seconds % 60
-    minutes = minutes % 60
-
-    if hours
-      "#{hours}:#{pad(minutes)}:#{pad(seconds % 60)}"
-    else
-      "#{minutes}:#{pad(seconds % 60)}"
-
-  @formatFull: (time) ->
-    pad = (number) -> if number < 10 then  "0#{number}" else number
-
-    seconds = Math.floor time
-    minutes = Math.floor seconds / 60
-    hours = Math.floor minutes / 60
-    seconds = seconds % 60
-    minutes = minutes % 60
-
-    # The returned value will not be user-facing. So no need for
-    # internationalization.
-    "#{pad(hours)}:#{pad(minutes)}:#{pad(seconds % 60)}"
-
-  @convert: (time, oldSpeed, newSpeed) ->
-    (time * oldSpeed / newSpeed).toFixed(3)
diff --git a/common/lib/xmodule/xmodule/js/src/time.js b/common/lib/xmodule/xmodule/js/src/time.js
new file mode 100644
index 0000000000..464d06ed5f
--- /dev/null
+++ b/common/lib/xmodule/xmodule/js/src/time.js
@@ -0,0 +1,47 @@
+(function (undefined) {
+    'use strict';
+
+    this.Time = {
+        format: format,
+        formatFull: formatFull,
+        convert: convert
+    };
+
+    return;
+
+    function format(time, formatFull) {
+        var hours, minutes, seconds;
+
+        seconds = Math.floor(time);
+        minutes = Math.floor(seconds / 60);
+        hours = Math.floor(minutes / 60);
+        seconds = seconds % 60;
+        minutes = minutes % 60;
+
+        if (formatFull) {
+            return '' + _pad(hours) + ':' + _pad(minutes) + ':' + _pad(seconds % 60);
+        } else if (hours) {
+            return '' + hours + ':' + _pad(minutes) + ':' + _pad(seconds % 60);
+        } else {
+            return '' + minutes + ':' + _pad(seconds % 60);
+        }
+    }
+
+    function formatFull(time) {
+        // The returned value will not be user-facing. So no need for
+        // internationalization.
+        return format(time, true);
+    }
+
+    function convert(time, oldSpeed, newSpeed) {
+        return (time * oldSpeed / newSpeed).toFixed(3);
+    }
+
+    function _pad(number) {
+        if (number < 10) {
+            return '0' + number;
+        } else {
+            return '' + number;
+        }
+    }
+}).call(this);