Năm 1990 có bao nhiêu ngày Thứ 6

5/1/1990 12/1/1990 19/1/1990 26/1/1990 2/2/1990 9/2/1990 16/2/1990 23/2/1990 2/3/1990 9/3/1990 16/3/1990 23/3/1990 30/3/1990 6/4/1990 13/4/1990 20/4/1990 27/4/1990 4/5/1990 11/5/1990 18/5/1990 25/5/1990 1/6/1990 8/6/1990 15/6/1990 22/6/1990 29/6/1990 6/7/1990 13/7/1990 20/7/1990 27/7/1990 3/8/1990 10/8/1990 17/8/1990 24/8/1990 31/8/1990 7/9/1990 14/9/1990 21/9/1990 28/9/1990 5/10/1990 12/10/1990 19/10/1990 26/10/1990 2/11/1990 9/11/1990 16/11/1990 23/11/1990 30/11/1990 7/12/1990 14/12/1990 21/12/1990 28/12/1990