Index: dojo-release-1.3.2-src/dijit/_Calendar.js
===================================================================
--- dojo-release-1.3.2-src.orig/dijit/_Calendar.js	2009-09-04 11:21:12.000000000 -0700
+++ dojo-release-1.3.2-src/dijit/_Calendar.js	2009-09-04 11:22:24.000000000 -0700
@@ -96,6 +96,25 @@
 			node.appendChild(dojo.doc.createTextNode(text));
 		},
 
+		// redraw UI with new value of firstDayOfWeek
+		repopulate: function(firstDayOfWeek) {
+			if (firstDayOfWeek)
+				this.attr('firstDayOfWeek', firstDayOfWeek);
+
+			this._populateDayOfWeek();
+			this._populateGrid();
+		},
+
+		_populateDayOfWeek: function(){
+			// insert localized day names in the header
+			var dayNames = dojo.date.locale.getNames('days', this.dayWidth, 'standAlone', this.lang);
+			var dayOffset = this.attr('firstDayOfWeek');
+
+			dojo.query(".dijitCalendarDayLabel", this.domNode).forEach(function(label, i){
+				this._setText(label, dayNames[(i + dayOffset) % 7]);
+			}, this);
+		},
+
 		_populateGrid: function(){
 			// summary:
 			//      Fills in the calendar grid with each day (1-31)
@@ -109,7 +128,8 @@
 			var today = new Date();
 			var selected = this.value;
 
-			var dayOffset = dojo.cldr.supplemental.getFirstDayOfWeek(this.lang);
+			var dayOffset = this.attr('firstDayOfWeek');
+
 			if(dayOffset > firstDay){ dayOffset -= 7; }
 
 			// Iterate through dates in the calendar and fill in date numbers and style info
@@ -195,6 +215,9 @@
 
 		postCreate: function(){
 			this.inherited(arguments);
+			if (!this.attr('firstDayOfWeek'))
+				this.attr('firstDayOfWeek', dojo.cldr.supplemental.getFirstDayOfWeek(this.lang));
+
 			dojo.setSelectable(this.domNode, false);
 
 			var cloneClass = dojo.hitch(this, function(clazz, n){
@@ -212,11 +235,7 @@
 			cloneClass(".dijitCalendarWeekTemplate", 5);
 
 			// insert localized day names in the header
-			var dayNames = dojo.date.locale.getNames('days', this.dayWidth, 'standAlone', this.lang);
-			var dayOffset = dojo.cldr.supplemental.getFirstDayOfWeek(this.lang);
-			dojo.query(".dijitCalendarDayLabel", this.domNode).forEach(function(label, i){
-				this._setText(label, dayNames[(i + dayOffset) % 7]);
-			}, this);
+			this._populateDayOfWeek();
 
 			// Fill in spacer element with all the month names (invisible) so that the maximum width will affect layout
 			var monthNames = dojo.date.locale.getNames('months', 'wide', 'standAlone', this.lang);
Index: dojo-release-1.3.2-src/dijit/form/_DateTimeTextBox.js
===================================================================
--- dojo-release-1.3.2-src.orig/dijit/form/_DateTimeTextBox.js	2009-09-04 11:21:12.000000000 -0700
+++ dojo-release-1.3.2-src/dijit/form/_DateTimeTextBox.js	2009-09-04 11:22:24.000000000 -0700
@@ -113,6 +113,7 @@
 			if(!this._picker){
 				var PopupProto=dojo.getObject(this.popupClass, false);
 				this._picker = new PopupProto({
+					firstDayOfWeek: this.attr('firstDayOfWeek'),
 					onValueSelected: function(value){
 						if(textBox._tabbingAway){
 							delete textBox._tabbingAway;
@@ -190,6 +191,8 @@
 		postCreate: function(){
 			this.inherited(arguments);
 			this.connect(this.focusNode, 'onkeypress', this._onKeyPress);
+			if (!this.attr('firstDayOfWeek'))
+				this.attr('firstDayOfWeek', dojo.cldr.supplemental.getFirstDayOfWeek(this.lang));
 		},
 
 		_onKeyPress: function(/*Event*/ e){