diff --git a/calendar.js b/calendar.js
index ba8c7dc..ab0c804 100644
--- a/calendar.js
+++ b/calendar.js
@@ -11,7 +11,8 @@
  */
 var Calendar = {
 	month_names: ["January","February","March","April","May","June","July","Augest","September","October","November","December"],
-	weekdays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
+	weekdays: ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],
+	sunday: 0,
 	month_days: [31,28,31,30,31,30,31,31,30,31,30,31],
 	//Get today's date - year, month, day and date
 	today : new Date(),
@@ -66,7 +67,7 @@ var Calendar = {
 		
 		var previous_month = month-1;
 		var previous_month_year = year;
-		if(previous_month< 0) {
+		if(previous_month<0) {
 			previous_month = 11;
 			previous_month_year--;
 		}
@@ -97,7 +98,7 @@ var Calendar = {
 		
 		//Get the first day of this month
 		var first_day = new Date(year,month,1);
-		var start_day = first_day.getDay();
+		var start_day = (first_day.getDay()+Calendar.sunday)%7;
 		
 		var d = 1;
 		var flag = 0;