diff --git a/AUTHORS b/AUTHORS
index e218b72..eed1c65 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,3 +1,4 @@
 Alan K <ack@modeswitch.org> (blog.modeswitch.org)
 David Humphrey <david.humphrey@senecacollege.ca> (@humphd)
 Abir Viqar <abiviq@hushmail.com>
+Barry Tulchinsky <barry.tulchinsky@gmail.com> (@btulchinsky)
diff --git a/README.md b/README.md
index 86c81e4..994d41e 100644
--- a/README.md
+++ b/README.md
@@ -336,3 +336,11 @@ Asynchronous truncate(2). Callback gets no additional arguments.
 #### fs.ftruncate(fd, length, callback)
 
 Asynchronous ftruncate(2). Callback gets no additional arguments.
+
+#### fs.utimes(path, atime, mtime, callback)
+
+Asynchronous utimes(3). Callback gets no additional arguments.
+
+#### fs.futimes(fd, atime, mtime, callback)
+
+Asynchronous futimes(3). Callback gets no additional arguments.
diff --git a/src/fs.js b/src/fs.js
index 087181b..0bc3b20 100644
--- a/src/fs.js
+++ b/src/fs.js
@@ -1069,6 +1069,55 @@ define(function(require) {
     }
   }
 
+  function utimes_file(context, path, atime, mtime, callback) {
+    path = normalize(path);
+
+    function update_times (error, node) {
+      if (error) {
+        callback(error);
+      }
+      else {
+        node.atime = atime;
+        node.mtime = mtime;
+        context.put(node.id, node, callback);
+      }
+    }
+
+    if (typeof atime != 'number' || typeof mtime != 'number') {
+      callback(new EInvalid('atime and mtime must be number'));
+    }
+    else if (atime < 0 || mtime < 0) {
+      callback(new EInvalid('atime and mtime must be positive integers'));
+    }
+    else {
+      find_node(context, path, update_times);
+    }
+  }
+
+  function futimes_file(context, ofd, atime, mtime, callback) {
+
+    function update_times (error, node) {
+      if (error) {
+        callback(error);
+      }
+      else {
+        node.atime = atime;
+        node.mtime = mtime;
+        context.put(node.id, node, callback);
+      }
+    }
+
+    if (typeof atime != 'number' || typeof mtime != 'number') {
+      callback(new EInvalid('atime and mtime must be a number'));
+    }
+    else if (atime < 0 || mtime < 0) {
+      callback(new EInvalid('atime and mtime must be positive integers'));
+    }
+    else {
+      context.get(ofd.id, update_times);
+    }
+  }
+
   function validate_flags(flags) {
     if(!_(O_FLAGS).has(flags)) {
       return null;
@@ -1555,9 +1604,47 @@ define(function(require) {
     read_directory(context, path, check_result);
   }
 
-  function _utimes(path, atime, mtime, callback) {
-    // TODO
-    //     if(!nullCheck(path, callback)) return;
+  function _utimes(context, path, atime, mtime, callback) {
+    if(!nullCheck(path, callback)) return;
+
+    var currentTime = Date.now();
+    atime = (atime) ? atime : currentTime;
+    mtime = (mtime) ? mtime : currentTime;
+
+    function check_result(error) {
+      if (error) {
+        callback(error);
+      }
+      else {
+        callback(null);
+      }
+    }
+    utimes_file(context, path, atime, mtime, check_result)
+  }
+
+  function _futimes(fs, context, fd, atime, mtime, callback) {
+    function check_result(error) {
+      if (error) {
+        callback(error);
+      }
+      else {
+        callback(null);
+      }
+    }
+
+    var currentTime = Date.now()
+    atime = (atime) ? atime : currentTime;
+    mtime = (mtime) ? mtime : currentTime;
+
+    var ofd = fs.openFiles[fd];
+
+    if(!ofd) {
+      callback(new EBadFileDescriptor('invalid file descriptor'));
+    } else if(!_(ofd.flags).contains(O_WRITE)) {
+      callback(new EBadFileDescriptor('descriptor does not permit writing'));
+    } else {
+      futimes_file(context, ofd, atime, mtime, check_result);
+    }
   }
 
   function _rename(context, oldpath, newpath, callback) {
@@ -1895,6 +1982,34 @@ define(function(require) {
     );
     if(error) callback(error);
   };
+  FileSystem.prototype.utimes = function(path, atime, mtime, callback) {
+    callback = maybeCallback(callback);
+    var fs = this;
+    var error = fs.queueOrRun(
+      function () {
+        var context = fs.provider.getReadWriteContext();
+        _utimes(context, path, atime, mtime, callback);
+      }
+    );
+    
+    if (error) {
+      callback(error);
+    }
+  };
+  FileSystem.prototype.futimes = function(fd, atime, mtime, callback) {
+    callback = maybeCallback(callback);
+    var fs = this;
+    var error = fs.queueOrRun(
+      function () {
+        var context = fs.provider.getReadWriteContext();
+        _futimes(fs, context, fd, atime, mtime, callback);
+      }
+    );
+
+    if (error) {
+      callback(error);
+    }
+  };
 
   return FileSystem;
 
diff --git a/tests/spec/fs.utimes.spec.js b/tests/spec/fs.utimes.spec.js
new file mode 100644
index 0000000..46525de
--- /dev/null
+++ b/tests/spec/fs.utimes.spec.js
@@ -0,0 +1,317 @@
+define(["IDBFS"], function(IDBFS) {
+
+  describe('fs.utimes', function() {
+    beforeEach(function() {
+      this.db_name = mk_db_name();
+      this.fs = new IDBFS.FileSystem({
+        name: this.db_name,
+        flags: 'FORMAT'
+      });
+    });
+
+    afterEach(function() {
+      indexedDB.deleteDatabase(this.db_name);
+      delete this.fs;
+    });
+
+    it('should be a function', function() {
+      expect(typeof this.fs.utimes).toEqual('function');
+    });
+
+    it('should error when atime is negative', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      that.fs.writeFile('/testfile', '', function(error) {
+        if (error) throw error;
+
+        that.fs.utimes('/testfile', -1, Date.now(), function (error) {
+          _error = error;
+          complete = true;
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('EInvalid');
+      });
+    });
+
+    it('should error when mtime is negative', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      that.fs.writeFile('/testfile', '', function(error) {
+        if (error) throw error;
+
+        that.fs.utimes('/testfile', Date.now(), -1, function (error) {
+          _error = error;
+          complete = true;
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('EInvalid');
+      });
+    });
+
+    it('should error when atime is as invalid number', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      that.fs.writeFile('/testfile', '', function (error) {
+        if (error) throw error;
+
+        that.fs.utimes('/testfile', 'invalid datetime', Date.now(), function (error) {
+          _error = error;
+          complete = true;
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('EInvalid');
+      });
+    });
+
+    it ('should error when path does not exist', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      var atime = Date.parse('1 Oct 2000 15:33:22');
+      var mtime = Date.parse('30 Sep 2000 06:43:54');
+
+      that.fs.utimes('/pathdoesnotexist', atime, mtime, function (error) {
+        _error = error;
+        complete = true;
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('ENoEntry');
+      });
+    });
+
+    it('should error when mtime is an invalid number', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      that.fs.writeFile('/testfile', '', function (error) {
+        if (error) throw error;
+
+        that.fs.utimes('/testfile', Date.now(), 'invalid datetime', function (error) {
+          _error = error;
+          complete = true;
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('EInvalid');
+      });
+    });
+
+    it ('should error when file descriptor is invalid', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      var atime = Date.parse('1 Oct 2000 15:33:22');
+      var mtime = Date.parse('30 Sep 2000 06:43:54');
+
+      that.fs.futimes(1, atime, mtime, function (error) {
+        _error = error;
+        complete = true;
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toBeDefined();
+        expect(_error.name).toEqual('EBadFileDescriptor');
+      });
+    });
+
+    it('should change atime and mtime of a file path', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      var _stat;
+
+      var atime = Date.parse('1 Oct 2000 15:33:22');
+      var mtime = Date.parse('30 Sep 2000 06:43:54');
+
+      that.fs.writeFile('/testfile', '', function (error) {
+        if (error) throw error;
+
+        that.fs.utimes('/testfile', atime, mtime, function (error) {
+          _error = error;
+
+          that.fs.stat('/testfile', function (error, stat) {
+            if (error) throw error;
+
+            _stat = stat;
+            complete = true;
+          });
+        });
+      });
+
+      waitsFor(function() {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function() {
+        expect(_error).toEqual(null);
+        expect(_stat.atime).toEqual(atime);
+        expect(_stat.mtime).toEqual(mtime);
+      });
+    });
+
+    it ('should change atime and mtime for a valid file descriptor', function (error) {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      var ofd;
+      var _stat;
+
+      var atime = Date.parse('1 Oct 2000 15:33:22');
+      var mtime = Date.parse('30 Sep 2000 06:43:54');
+
+      that.fs.open('/testfile', 'w', function (error, result) {
+        if (error) throw error;
+
+        ofd = result;
+
+        that.fs.futimes(ofd, atime, mtime, function (error) {
+          _error = error;
+
+          that.fs.fstat(ofd, function (error, stat) {
+            if (error) throw error;
+
+            _stat = stat;
+            complete = true;
+          });
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toEqual(null);
+        expect(_stat.atime).toEqual(atime);
+        expect(_stat.mtime).toEqual(mtime);
+      });
+    });
+
+    it ('should update atime and mtime of directory path', function (error) {
+      var complete = false
+      var _error;
+
+      //Note: required as the filesystem somehow gets removed from the Jasmine object
+      var fs = this.fs;
+
+      var _stat;
+
+      var atime = Date.parse('1 Oct 2000 15:33:22');
+      var mtime = Date.parse('30 Sep 2000 06:43:54');
+
+      fs.mkdir('/testdir', function (error) {
+        if (error) throw error;
+
+        fs.utimes('/testdir', atime, mtime, function (error) {
+          _error = error;
+
+          fs.stat('/testdir', function (error, stat) {
+            if (error) throw error;
+
+            _stat = stat;
+            complete = true;
+          });
+        });
+      });
+
+      waitsFor(function () {
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toEqual(null);
+        expect(_stat.atime).toEqual(atime);
+        expect(_stat.mtime).toEqual(mtime);
+        delete fs;
+      });
+    });
+
+    it ('should update atime and mtime when they are null', function () {
+      var complete = false;
+      var _error;
+      var that = this;
+
+      var atimeEst;
+      var mtimeEst;
+      var now;
+
+      that.fs.writeFile('/myfile', '', function (error) {
+        if (error) throw error;
+
+        that.fs.utimes('/myfile', null, null, function (error) {
+          _error = error;
+
+          now = Date.now();
+
+          that.fs.stat('/myfile', function (error, stat) {
+            if (error) throw error;
+
+            atimeEst = now - stat.atime;
+            mtimeEst = now - stat.mtime;
+            complete = true;
+          });
+        });
+      });
+
+      waitsFor(function (){
+        return complete;
+      }, 'test to complete', DEFAULT_TIMEOUT);
+
+      runs(function () {
+        expect(_error).toEqual(null);
+        // Note: testing estimation as time may differ by a couple of milliseconds
+        // This number should be increased if tests are on slow systems
+        expect(atimeEst).toBeLessThan(10);
+        expect(mtimeEst).toBeLessThan(10);
+      });
+    });
+  });
+});
\ No newline at end of file
diff --git a/tests/test-manifest.js b/tests/test-manifest.js
index 72c44a9..124f36e 100644
--- a/tests/test-manifest.js
+++ b/tests/test-manifest.js
@@ -27,6 +27,7 @@ define([
   "spec/fs.symlink.spec",
   "spec/fs.readlink.spec",
   "spec/fs.truncate.spec",
+  "spec/fs.utimes.spec",
   "spec/path-resolution.spec",
 
   // IDBFS.FileSystem.providers.*