Năm 1988 có bao nhiêu ngày Thứ 7

2/1/1988 9/1/1988 16/1/1988 23/1/1988 30/1/1988 6/2/1988 13/2/1988 20/2/1988 27/2/1988 5/3/1988 12/3/1988 19/3/1988 26/3/1988 2/4/1988 9/4/1988 16/4/1988 23/4/1988 30/4/1988 7/5/1988 14/5/1988 21/5/1988 28/5/1988 4/6/1988 11/6/1988 18/6/1988 25/6/1988 2/7/1988 9/7/1988 16/7/1988 23/7/1988 30/7/1988 6/8/1988 13/8/1988 20/8/1988 27/8/1988 3/9/1988 10/9/1988 17/9/1988 24/9/1988 1/10/1988 8/10/1988 15/10/1988 22/10/1988 29/10/1988 5/11/1988 12/11/1988 19/11/1988 26/11/1988 3/12/1988 10/12/1988 17/12/1988 24/12/1988 31/12/1988