fixed error with change of year

lib/dateView.js

@@ -292,15 +292,17 @@ function createWeekViewVertical(dataObj, now) {
 function createMonthView(dataObj, now, monthOffset) {
 
   var currentMonth = now.getMonth() + monthOffset;
-  var startDate = new Date(now.getFullYear(), currentMonth, 1);
+  var startDate = new Date(now.getFullYear(), now.getMonth() + monthOffset, 1);
   var monthDate = new Date(startDate);
 
   startDate.setDate(2 - startDate.getDay());
-
   var endDate = new Date(now.getFullYear(), currentMonth + 1, 1);
+
   if (endDate.getDay() != 1)
     endDate.setDate(9 - endDate.getDay());
 
+  currentMonth = currentMonth % 12;
+
   //TODO: only transform once for 3 month view
   var oHours = transformData(dataObj, startDate, endDate);