[Z_LoY]

 
time = new Date(date, day, hour, min, sec, ms);
d = time.getDay();
var thisDay:Number = new Date().getDay(); 
switch (thisDay) { 
 case 0 : 
 d = "Sun"; 
 break; 
 case 1 : 
 d = "Mon"; 
 break; 
 case 2 : 
 d = "Tue"; 
 break; 
 case 3 : 
 d = "Wed"; 
 break; 
 case 4 : 
 d = "Thu"; 
 break; 
 case 5 : 
 d = "Fri"; 
 break; 
 case 6 : 
 d = "Sat"; 
 break;

я делаю так и всё норм