diff --git a/README.md b/README.md
index 496b952..47486c1 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ Currently the following languages are supported
 - pt-BR
 - ru-RU
 - sv-SE
+- uk-UA
 
 You can set the current language with:
 
diff --git a/Source/Locale.uk-UA.DatePicker.js b/Source/Locale.uk-UA.DatePicker.js
new file mode 100644
index 0000000..3cabd41
--- /dev/null
+++ b/Source/Locale.uk-UA.DatePicker.js
@@ -0,0 +1,19 @@
+/*
+---
+name: Locale.en-US.DatePicker
+description: English Language File for DatePicker
+authors: Arian Stolwijk
+requires: [More/Locale]
+provides: Locale.en-US.DatePicker
+...
+*/
+
+
+Locale.define('uk-UA', 'DatePicker', {
+	select_a_time: 'Встановіть час',
+	use_mouse_wheel: 'Використовуйте прокрутку для швидкої зміни значення',
+	time_confirm_button: 'Гаразд',
+	apply_range: 'Застосувати',
+	cancel: 'Скасувати',
+	week: 'Т-нь'
+});
diff --git a/Source/Picker.Date.js b/Source/Picker.Date.js
index 8b4558e..fbc9fb9 100644
--- a/Source/Picker.Date.js
+++ b/Source/Picker.Date.js
@@ -42,6 +42,7 @@ this.DatePicker = Picker.Date = new Class({
 		updateAll : false, //whether or not to update all inputs when selecting a date
 
 		weeknumbers: false,
+		weekdays: null,
 
 		// if you like to use your own translations
 		months_abbr: null,
@@ -608,9 +609,12 @@ var isUnavailable = function(type, date, options){
 	var minDate = options.minDate,
 		maxDate = options.maxDate,
 		availableDates = options.availableDates,
+		weekdays = options.weekdays,
 		year, month, day, ms;
-
-	if (!minDate && !maxDate && !availableDates) return false;
+	if ( typeof avaliableDates == 'undefined' ) {
+		availableDates = null;
+	}
+	if (!minDate && !maxDate && !availableDates && !weekdays) return false;
 	date.clearTime();
 
 	if (type == 'year'){
@@ -653,8 +657,12 @@ var isUnavailable = function(type, date, options){
 	year = date.get('year');
 	month = date.get('month') + 1;
 	day = date.get('date');
+	weekday = date.getDay();
 
 	var dateAllow = (minDate && date < minDate) || (maxDate && date > maxDate);
+	if ( weekdays !== null ) {
+		dateAllow = dateAllow || !weekdays.contains(weekday);
+	}
 	if (availableDates != null){
 		dateAllow = dateAllow
 			|| availableDates[year] == null