diff --git a/HISTORY.md b/HISTORY.md
index eabc887d..936b46e9 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,6 +1,7 @@
 # vis.js history
 http://visjs.org
 
+
 ## NOT YET RELEASED, version 4.9.0
 
 ### Network
@@ -8,13 +9,14 @@ http://visjs.org
 - Fixed bug where an edge that was not connected would crash the layout algorithms.
 - Fixed bug where a box shape could not be drawn outside of the viewable area.
 - Fixed bug where dragging a node that is not a control node during edit edge mode would throw an error.
-- Made autoscaling on container size change pick the lowest between delta height and delta width.
+- Made auto scaling on container size change pick the lowest between delta height and delta width.
 - Added images with borders option (useBorderWithImage)
-- Updated the manipulation css to fix offset if there is no seperator.
+- Updated the manipulation css to fix offset if there is no separator.
 
 ### Timeline
 
 - Fixed #1326: wrongly positioned dot of PointItems.
+- Fixed #1249: option `hiddenDates` not accepting a single hidden date.
 - Fixed a bug when pinching and using hidden dates. Thanks @lauzierj.
 
 
@@ -29,6 +31,7 @@ http://visjs.org
 - Fixed arrows with some shapes when they are selected. #1292
 - Fixed deletion of options by settings them to null.
 
+
 ## 2015-09-07, version 4.8.1
 
 ### Network
diff --git a/dist/vis.js b/dist/vis.js
index bafba571..c5767b28 100644
--- a/dist/vis.js
+++ b/dist/vis.js
@@ -14117,11 +14117,15 @@ return /******/ (function(modules) { // webpackBootstrap
    * 
    * @param {function} moment
    * @param {Object} body
-   * @param {Array} hiddenDates
+   * @param {Array | Object} hiddenDates
    */
   "use strict";
 
   exports.convertHiddenOptions = function (moment, body, hiddenDates) {
+    if (hiddenDates && !Array.isArray(hiddenDates)) {
+      return exports.convertHiddenOptions(moment, body, [hiddenDates]);
+    }
+
     body.hiddenDates = [];
     if (hiddenDates) {
       if (Array.isArray(hiddenDates) == true) {
@@ -14144,9 +14148,13 @@ return /******/ (function(modules) { // webpackBootstrap
    * create new entrees for the repeating hidden dates
    * @param {function} moment
    * @param {Object} body
-   * @param {Array} hiddenDates
+   * @param {Array | Object} hiddenDates
    */
   exports.updateHiddenDates = function (moment, body, hiddenDates) {
+    if (hiddenDates && !Array.isArray(hiddenDates)) {
+      return exports.updateHiddenDates(moment, body, [hiddenDates]);
+    }
+
     if (hiddenDates && body.domProps.centerContainer.width !== undefined) {
       exports.convertHiddenOptions(moment, body, hiddenDates);
 
@@ -17535,8 +17543,11 @@ return /******/ (function(modules) { // webpackBootstrap
     this.switchedDay = false;
     this.switchedMonth = false;
     this.switchedYear = false;
-    this.hiddenDates = hiddenDates;
-    if (hiddenDates === undefined) {
+    if (Array.isArray(hiddenDates)) {
+      this.hiddenDates = hiddenDates;
+    } else if (hiddenDates != undefined) {
+      this.hiddenDates = [hiddenDates];
+    } else {
       this.hiddenDates = [];
     }
 
@@ -23300,10 +23311,14 @@ return /******/ (function(modules) { // webpackBootstrap
     },
     groupOrderSwap: { 'function': 'function' },
     height: { string: string, number: number },
-    hiddenDates: { object: object, array: array },
+    hiddenDates: {
+      start: { date: date, number: number, string: string, moment: moment },
+      end: { date: date, number: number, string: string, moment: moment },
+      repeat: { string: string },
+      __type__: { object: object, array: array }
+    },
     locale: { string: string },
     locales: {
-      __any__: { any: any },
       __type__: { object: object }
     },
     margin: {
@@ -26789,7 +26804,12 @@ return /******/ (function(modules) { // webpackBootstrap
     },
     moment: { 'function': 'function' },
     height: { string: string, number: number },
-    hiddenDates: { object: object, array: array },
+    hiddenDates: {
+      start: { date: date, number: number, string: string, moment: moment },
+      end: { date: date, number: number, string: string, moment: moment },
+      repeat: { string: string },
+      __type__: { object: object, array: array }
+    },
     locale: { string: string },
     locales: {
       __any__: { any: any },
diff --git a/lib/timeline/DateUtil.js b/lib/timeline/DateUtil.js
index 0f93e3e8..1a8a9076 100644
--- a/lib/timeline/DateUtil.js
+++ b/lib/timeline/DateUtil.js
@@ -4,9 +4,13 @@
  * 
  * @param {function} moment
  * @param {Object} body
- * @param {Array} hiddenDates
+ * @param {Array | Object} hiddenDates
  */
 exports.convertHiddenOptions = function(moment, body, hiddenDates) {
+  if (hiddenDates && !Array.isArray(hiddenDates)) {
+    return exports.convertHiddenOptions(moment, body, [hiddenDates])
+  }
+
   body.hiddenDates = [];
   if (hiddenDates) {
     if (Array.isArray(hiddenDates) == true) {
@@ -30,9 +34,13 @@ exports.convertHiddenOptions = function(moment, body, hiddenDates) {
  * create new entrees for the repeating hidden dates
  * @param {function} moment
  * @param {Object} body
- * @param {Array} hiddenDates
+ * @param {Array | Object} hiddenDates
  */
 exports.updateHiddenDates = function (moment, body, hiddenDates) {
+  if (hiddenDates && !Array.isArray(hiddenDates)) {
+    return exports.updateHiddenDates(moment, body, [hiddenDates])
+  }
+
   if (hiddenDates && body.domProps.centerContainer.width !== undefined) {
     exports.convertHiddenOptions(moment, body, hiddenDates);
 
@@ -135,7 +143,7 @@ exports.updateHiddenDates = function (moment, body, hiddenDates) {
               case "weekly":
                 startDate.add(1, 'weeks');
                 endDate.add(1, 'weeks');
-                break
+                break;
               case "monthly":
                 startDate.add(1, 'months');
                 endDate.add(1, 'months');
diff --git a/lib/timeline/TimeStep.js b/lib/timeline/TimeStep.js
index c4412f3f..e7cb1888 100644
--- a/lib/timeline/TimeStep.js
+++ b/lib/timeline/TimeStep.js
@@ -47,8 +47,13 @@ function TimeStep(start, end, minimumStep, hiddenDates) {
   this.switchedDay = false;
   this.switchedMonth = false;
   this.switchedYear = false;
-  this.hiddenDates = hiddenDates;
-  if (hiddenDates === undefined) {
+  if (Array.isArray(hiddenDates)) {
+    this.hiddenDates = hiddenDates;
+  }
+  else if (hiddenDates != undefined) {
+    this.hiddenDates = [hiddenDates];
+  }
+  else {
     this.hiddenDates = [];
   }
 
diff --git a/lib/timeline/optionsGraph2d.js b/lib/timeline/optionsGraph2d.js
index d5ef4bae..a2faf89d 100644
--- a/lib/timeline/optionsGraph2d.js
+++ b/lib/timeline/optionsGraph2d.js
@@ -128,7 +128,12 @@ let allOptions = {
   },
   moment: {'function': 'function'},
   height: {string, number},
-  hiddenDates: {object, array},
+  hiddenDates: {
+    start: {date, number, string, moment},
+    end: {date, number, string, moment},
+    repeat: {string},
+    __type__: {object, array}
+  },
   locale:{string},
   locales:{
     __any__: {any},
diff --git a/lib/timeline/optionsTimeline.js b/lib/timeline/optionsTimeline.js
index 8f8c829a..5d0ad3c1 100644
--- a/lib/timeline/optionsTimeline.js
+++ b/lib/timeline/optionsTimeline.js
@@ -73,10 +73,14 @@ let allOptions = {
   },
   groupOrderSwap: {'function': 'function'},
   height: {string, number},
-  hiddenDates: {object, array},
+  hiddenDates: {
+    start: {date, number, string, moment},
+    end: {date, number, string, moment},
+    repeat: {string},
+    __type__: {object, array}
+  },
   locale:{string},
   locales:{
-    __any__: {any},
     __type__: {object}
   },
   margin: {