Năm 1986 có bao nhiêu ngày Thứ 7

4/1/1986 11/1/1986 18/1/1986 25/1/1986 1/2/1986 8/2/1986 15/2/1986 22/2/1986 1/3/1986 8/3/1986 15/3/1986 22/3/1986 29/3/1986 5/4/1986 12/4/1986 19/4/1986 26/4/1986 3/5/1986 10/5/1986 17/5/1986 24/5/1986 31/5/1986 7/6/1986 14/6/1986 21/6/1986 28/6/1986 5/7/1986 12/7/1986 19/7/1986 26/7/1986 2/8/1986 9/8/1986 16/8/1986 23/8/1986 30/8/1986 6/9/1986 13/9/1986 20/9/1986 27/9/1986 4/10/1986 11/10/1986 18/10/1986 25/10/1986 1/11/1986 8/11/1986 15/11/1986 22/11/1986 29/11/1986 6/12/1986 13/12/1986 20/12/1986 27/12/1986