Năm 1977 có bao nhiêu ngày Thứ 6

7/1/1977 14/1/1977 21/1/1977 28/1/1977 4/2/1977 11/2/1977 18/2/1977 25/2/1977 4/3/1977 11/3/1977 18/3/1977 25/3/1977 1/4/1977 8/4/1977 15/4/1977 22/4/1977 29/4/1977 6/5/1977 13/5/1977 20/5/1977 27/5/1977 3/6/1977 10/6/1977 17/6/1977 24/6/1977 1/7/1977 8/7/1977 15/7/1977 22/7/1977 29/7/1977 5/8/1977 12/8/1977 19/8/1977 26/8/1977 2/9/1977 9/9/1977 16/9/1977 23/9/1977 30/9/1977 7/10/1977 14/10/1977 21/10/1977 28/10/1977 4/11/1977 11/11/1977 18/11/1977 25/11/1977 2/12/1977 9/12/1977 16/12/1977 23/12/1977 30/12/1977