Năm 1997 có bao nhiêu ngày Thứ 4

1/1/1997 8/1/1997 15/1/1997 22/1/1997 29/1/1997 5/2/1997 12/2/1997 19/2/1997 26/2/1997 5/3/1997 12/3/1997 19/3/1997 26/3/1997 2/4/1997 9/4/1997 16/4/1997 23/4/1997 30/4/1997 7/5/1997 14/5/1997 21/5/1997 28/5/1997 4/6/1997 11/6/1997 18/6/1997 25/6/1997 2/7/1997 9/7/1997 16/7/1997 23/7/1997 30/7/1997 6/8/1997 13/8/1997 20/8/1997 27/8/1997 3/9/1997 10/9/1997 17/9/1997 24/9/1997 1/10/1997 8/10/1997 15/10/1997 22/10/1997 29/10/1997 5/11/1997 12/11/1997 19/11/1997 26/11/1997 3/12/1997 10/12/1997 17/12/1997 24/12/1997 31/12/1997