diff --git a/src/helpers.js b/src/helpers.js
index b92e57c..575c26d 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -106,6 +106,9 @@ function registerWith(Handlebars) {
     }
 
     function formatDate(date, format, options) {
+        if (typeof date === 'function') {
+            date = date.call(this);
+        }
         date = new Date(date);
         assertIsDate(date, 'A date or timestamp must be provided to {{formatDate}}');
 
@@ -121,6 +124,9 @@ function registerWith(Handlebars) {
     }
 
     function formatTime(date, format, options) {
+        if (typeof date === 'function') {
+            date = date.call(this);
+        }
         date = new Date(date);
         assertIsDate(date, 'A date or timestamp must be provided to {{formatTime}}');
 
@@ -136,6 +142,9 @@ function registerWith(Handlebars) {
     }
 
     function formatRelative(date, format, options) {
+        if (typeof date === 'function') {
+            date = date.call(this);
+        }
         date = new Date(date);
         assertIsDate(date, 'A date or timestamp must be provided to {{formatRelative}}');
 
@@ -158,6 +167,9 @@ function registerWith(Handlebars) {
     }
 
     function formatNumber(num, format, options) {
+        if (typeof num === 'function') {
+            num = num.call(this);
+        }
         assertIsNumber(num, 'A number must be provided to {{formatNumber}}');
 
         if (!options) {
@@ -176,6 +188,9 @@ function registerWith(Handlebars) {
             options = message;
             message = null;
         }
+        if (typeof message === 'function') {
+            message = message.call(this);
+        }
 
         var hash = options.hash;
 
diff --git a/tests/helpers.js b/tests/helpers.js
index c60f357..6434915 100644
--- a/tests/helpers.js
+++ b/tests/helpers.js
@@ -57,6 +57,13 @@ describe('Helper `formatNumber`', function () {
             expect(tmpl({ NUM: 40000.004 })).to.equal('40,000.004');
         });
 
+        it('should support number as a function', function() {
+            var tmpl = intlBlock('{{formatNumber numFn}}', {locales: 'en-US'});
+            expect(tmpl({
+                numFn: function() { return 4; }
+            })).to.equal('4');
+        });
+
         describe('in another locale', function () {
             it('should return a string', function () {
                 var tmpl = intlBlock('{{formatNumber 4}}', {locales: 'de-DE'});
@@ -185,6 +192,13 @@ describe('Helper `formatDate`', function () {
         var tmpl = intlBlock('{{formatDate 0}}', {locales: 'en-US'});
         expect(tmpl()).to.equal(new Intl.DateTimeFormat('en').format(0));
     });
+
+    it('should support date as a function', function() {
+        var tmpl = intlBlock('{{formatDate dateFn}}', {locales: 'en-US'});
+        expect(tmpl({
+            dateFn: function() { return timeStamp; }
+        })).to.equal('1/23/2014');
+    });
 });
 
 describe('Helper `formatTime`', function () {
@@ -219,6 +233,13 @@ describe('Helper `formatTime`', function () {
         var tmpl = intlBlock('{{formatTime ' + timeStamp + ' hour="numeric" minute="numeric" timeZone="UTC"}}', {locales: 'en-US'});
         expect(tmpl()).to.equal('11:00 PM');
     });
+
+    it('should support date as a function', function() {
+        var tmpl = intlBlock('{{formatTime dateFn}}', {locales: 'en-US'});
+        expect(tmpl({
+            dateFn: function() { return timeStamp; }
+        })).to.equal('1/23/2014');
+    });
 });
 
 describe('Helper `formatRelative`', function () {
@@ -257,6 +278,13 @@ describe('Helper `formatRelative`', function () {
         var tmpl = intlBlock('{{formatRelative 0 now=1000}}', {locales: 'en-US'});
         expect(tmpl()).to.equal('1 second ago');
     });
+
+    it('should support date as a function', function() {
+        var tmpl = intlBlock('{{formatRelative dateFn}}', {locales: 'en-US'});
+        expect(tmpl({
+            dateFn: function() { return tomorrow; }
+        })).to.equal('tomorrow');
+    });
 });
 
 describe('Helper `formatMessage`', function () {
@@ -333,6 +361,17 @@ describe('Helper `formatMessage`', function () {
 
         expect(out).to.equal('This is my 3rd birthday.');
     });
+
+    it('should support message as a function', function () {
+        var tmpl = intlBlock('{{formatMessage messageFn firstName=firstName lastName=lastName}}', {locales: 'en-US'}),
+            out  = tmpl({
+                messageFn: function() { return 'Hi, my name is {firstName} {lastName}.'; },
+                firstName: 'Anthony',
+                lastName : 'Pipkin'
+            });
+
+        expect(out).to.equal('Hi, my name is Anthony Pipkin.');
+    });
 });
 
 describe('Helper `intl`', function () {