1997/1/7: 010797 = 010:797 = each is palindrome
1997/1/12: 011297 = 011:297 = integer ratio of 1 to 27
1997/2/7: 020797 = 020:797 = each is palindrome
1997/3/7: 030797 = 030:797 = each is palindrome
1997/4/7: 040797 = 040:797 = each is palindrome
1997/4/16: 041697 = 041:697 = integer ratio of 1 to 17
1997/5/3: 9753 = 9:7:5:3 = arthimetic series of increment -2
1997/5/7: 050797 = 050:797 = each is palindrome
1997/5/31: 97531 = 9:7:5:3:1 = arthimetic series of increment -2
1997/6/7: 060797 = 060:797 = each is palindrome
1997/7/1: 010797 = 010:797 = each is palindrome
1997/7/2: 020797 = 020:797 = each is palindrome
1997/7/3: 030797 = 030:797 = each is palindrome
1997/7/4: 040797 = 040:797 = each is palindrome
1997/7/5: 050797 = 050:797 = each is palindrome
1997/7/6: 060797 = 060:797 = each is palindrome
1997/7/7: 070797 = 070:797 = each is palindrome
1997/7/8: 080797 = 080:797 = each is palindrome
1997/7/9: 090797 = 090:797 = each is palindrome
1997/7/9: 7997 = palindrome
1997/7/9: 97079 = palindrome
1997/7/9: 9779 = palindrome
1997/7/9: 9797 = cyclic permutation symmetric
1997/7/14: 071497 = 071:497 = integer ratio of 1 to 7
1997/8/7: 080797 = 080:797 = each is palindrome
1997/9/6: 199796 = 199:796 = integer ratio of 1 to 4
1997/9/7: 090797 = 090:797 = each is palindrome
1997/9/7: 7997 = palindrome
1997/9/7: 9797 = cyclic permutation symmetric
1997/10/1: 971001 = 971:001 = integer ratio of 971 to 1
1997/10/17: 101797 = 101:797 = each is palindrome
1997/10/29: 291097 = 291:097 = integer ratio of 3 to 1
1997/11/17: 111797 = 111:797 = each is palindrome
1997/12/1: 011297 = 011:297 = integer ratio of 1 to 27
1997/12/17: 121797 = 121:797 = each is palindrome