diff --git a/modules/backend/formwidgets/DatePicker.php b/modules/backend/formwidgets/DatePicker.php
index c705f8fb4..2259174a6 100644
--- a/modules/backend/formwidgets/DatePicker.php
+++ b/modules/backend/formwidgets/DatePicker.php
@@ -52,6 +52,11 @@ class DatePicker extends FormWidgetBase
      */
     public $firstDay = 0;
 
+    /**
+     * @var bool show week numbers at head of row
+     */
+    public $showWeekNumber = false;
+
     /**
      * @var bool change datetime exactly as is in database
      */
@@ -78,6 +83,7 @@ class DatePicker extends FormWidgetBase
             'maxDate',
             'yearRange',
             'firstDay',
+            'showWeekNumber',
             'ignoreTimezone',
         ]);
 
@@ -126,6 +132,7 @@ class DatePicker extends FormWidgetBase
         $this->vars['maxDate'] = $this->maxDate;
         $this->vars['yearRange'] = $this->yearRange;
         $this->vars['firstDay'] = $this->firstDay;
+        $this->vars['showWeekNumber'] = $this->showWeekNumber;
         $this->vars['ignoreTimezone'] = $this->ignoreTimezone;
         $this->vars['format'] = $this->format;
         $this->vars['formatMoment'] = $this->getDateFormatMoment();
diff --git a/modules/backend/formwidgets/datepicker/partials/_datepicker.htm b/modules/backend/formwidgets/datepicker/partials/_datepicker.htm
index d131814a2..cce11b1b3 100644
--- a/modules/backend/formwidgets/datepicker/partials/_datepicker.htm
+++ b/modules/backend/formwidgets/datepicker/partials/_datepicker.htm
@@ -15,6 +15,7 @@
         <?php if ($maxDate): ?>data-max-date="<?= $maxDate ?>"<?php endif ?>
         <?php if ($yearRange): ?>data-year-range="<?= $yearRange ?>"<?php endif ?>
         <?php if ($firstDay): ?>data-first-day="<?= $firstDay ?>"<?php endif ?>
+        data-show-week-number="<?= $showWeekNumber ?>"
         <?php if ($ignoreTimezone): ?>data-ignore-timezone<?php endif ?>
     >
 
diff --git a/modules/system/assets/ui/js/datepicker.js b/modules/system/assets/ui/js/datepicker.js
index a1d84cd10..83993abbb 100644
--- a/modules/system/assets/ui/js/datepicker.js
+++ b/modules/system/assets/ui/js/datepicker.js
@@ -104,6 +104,7 @@
         var pikadayOptions = {
             yearRange: this.options.yearRange,
             firstDay: this.options.firstDay,
+            showWeekNumber: this.options.showWeekNumber,
             format: dateFormat,
             setDefaultDate: now,
             onOpen: function() {
@@ -314,7 +315,8 @@
         maxDate: null,
         format: null,
         yearRange: 10,
-        firstDay: 0
+        firstDay: 0,
+        showWeekNumber: false
     }
 
     // PLUGIN DEFINITION
diff --git a/modules/system/assets/ui/storm-min.js b/modules/system/assets/ui/storm-min.js
index b7c9f7258..2422845f1 100644
--- a/modules/system/assets/ui/storm-min.js
+++ b/modules/system/assets/ui/storm-min.js
@@ -2878,7 +2878,7 @@ this.$el=null
 this.options=null
 BaseProto.dispose.call(this)}
 DatePicker.prototype.initDatePicker=function(){var self=this,dateFormat=this.getDateFormat(),now=moment().tz(this.timezone).format(dateFormat)
-var pikadayOptions={yearRange:this.options.yearRange,firstDay:this.options.firstDay,format:dateFormat,setDefaultDate:now,onOpen:function(){var $field=$(this._o.trigger)
+var pikadayOptions={yearRange:this.options.yearRange,firstDay:this.options.firstDay,showWeekNumber:this.options.showWeekNumber,format:dateFormat,setDefaultDate:now,onOpen:function(){var $field=$(this._o.trigger)
 $(this.el).css({left:'auto',right:$(window).width()-$field.offset().left-$field.outerWidth()})},onSelect:function(){self.onSelectDatePicker.call(self,this.getMoment())}}
 var lang=this.getLang('datepicker',false)
 if(lang){pikadayOptions.i18n=lang}
@@ -2929,7 +2929,7 @@ if(this.ignoreTimezone){this.appTimezone='UTC'
 this.timezone='UTC'}}
 DatePicker.prototype.getLang=function(name,defaultValue){if($.oc===undefined||$.oc.lang===undefined){return defaultValue}
 return $.oc.lang.get(name,defaultValue)}
-DatePicker.DEFAULTS={minDate:null,maxDate:null,format:null,yearRange:10,firstDay:0}
+DatePicker.DEFAULTS={minDate:null,maxDate:null,format:null,yearRange:10,firstDay:0,showWeekNumber:false}
 var old=$.fn.datePicker
 $.fn.datePicker=function(option){var args=Array.prototype.slice.call(arguments,1),items,result
 items=this.each(function(){var $this=$(this)