1975/1/5: 010575 = 010:575 = each is palindrome
1975/1/5: 1575 = 15:75 = integer ratio of 1 to 5
1975/1/5: 7515 = 75:15 = integer ratio of 5 to 1
1975/1/12: 011275 = 011:275 = integer ratio of 1 to 25
1975/1/25: 750125 = 750:125 = integer ratio of 6 to 1
1975/2/5: 020575 = 020:575 = each is palindrome
1975/2/5: 2575 = 25:75 = integer ratio of 1 to 3
1975/2/5: 7525 = 75:25 = integer ratio of 3 to 1
1975/3/1: 7531 = 7:5:3:1 = arthimetic series of increment -2
1975/3/5: 030575 = 030:575 = each is palindrome
1975/3/15: 031575 = 03:15:75 = geometric series of ratio 5
1975/3/17: 031775 = 031:775 = integer ratio of 1 to 25
1975/4/5: 040575 = 040:575 = each is palindrome
1975/5/1: 010575 = 010:575 = each is palindrome
1975/5/1: 1575 = 15:75 = integer ratio of 1 to 5
1975/5/2: 020575 = 020:575 = each is palindrome
1975/5/2: 2575 = 25:75 = integer ratio of 1 to 3
1975/5/3: 030575 = 030:575 = each is palindrome
1975/5/4: 040575 = 040:575 = each is palindrome
1975/5/5: 050575 = 050:575 = each is palindrome
1975/5/6: 060575 = 060:575 = each is palindrome
1975/5/7: 070575 = 070:575 = each is palindrome
1975/5/7: 5775 = palindrome
1975/5/7: 75057 = palindrome
1975/5/7: 7557 = palindrome
1975/5/7: 7575 = cyclic permutation symmetric
1975/5/8: 080575 = 080:575 = each is palindrome
1975/5/9: 090575 = 090:575 = each is palindrome
1975/6/5: 060575 = 060:575 = each is palindrome
1975/7/5: 070575 = 070:575 = each is palindrome
1975/7/5: 5775 = palindrome
1975/7/5: 7575 = cyclic permutation symmetric
1975/8/5: 080575 = 080:575 = each is palindrome
1975/9/1: 197591 = 197:591 = integer ratio of 1 to 3
1975/9/5: 090575 = 090:575 = each is palindrome
1975/10/1: 751001 = 751:001 = integer ratio of 751 to 1
1975/10/15: 101575 = 101:575 = each is palindrome
1975/11/15: 111575 = 111:575 = each is palindrome
1975/12/1: 011275 = 011:275 = integer ratio of 1 to 25
1975/12/15: 121575 = 121:575 = each is palindrome
1975/12/30: 123075 = 12:30:75 = geometric series of ratio 2.5