flex currentdate

one month

 public static const millisecondsPerMinute:int = 1000 * 60;
  public static const millisecondsPerHour:int = 1000 * 60 * 60;
  public static const millisecondsPerDay:int = 1000 * 60 * 60 * 24;
             
 var currentDate:Date = new Date();
 var dueDate:Date = new Date(currentDate.getTime() - (30 * millisecondsPerDay));
 
 obj.begindate = dueDate.fullYear+'-'+(dueDate.month+1)+'-'+dueDate.date;
 obj.enddate = currentDate.fullYear+'-'+(currentDate.month+1)+'-'+currentDate.date;