1964/1/4: 010464 = 010:464 = each is palindrome
1964/1/6: 1664 = 16:64 = integer ratio of 1 to 4
1964/1/6: 6416 = 64:16 = integer ratio of 4 to 1
1964/1/8: 010864 = 01:08:64 = geometric series of ratio 8
1964/1/12: 011264 = 011:264 = integer ratio of 1 to 24
1964/1/22: 012264 = 012:264 = integer ratio of 1 to 22
1964/1/25: 012564 = 012:564 = integer ratio of 1 to 47
1964/1/28: 012864 = 012:864 = integer ratio of 1 to 72
1964/1/28: 640128 = 640:128 = integer ratio of 5 to 1
1964/2/3: 3264 = 32:64 = integer ratio of 1 to 2
1964/2/4: 020464 = 020:464 = each is palindrome
1964/2/4: 241964 = 241:964 = integer ratio of 1 to 4
1964/2/22: 022264 = 022:264 = integer ratio of 1 to 12
1964/3/2: 3264 = 32:64 = integer ratio of 1 to 2
1964/3/2: 6432 = 64:32 = integer ratio of 2 to 1
1964/3/4: 030464 = 030:464 = each is palindrome
1964/3/20: 032064 = 032:064 = integer ratio of 1 to 2
1964/3/20: 640320 = 640:320 = integer ratio of 2 to 1
1964/3/28: 032864 = 032:864 = integer ratio of 1 to 27
1964/4/1: 010464 = 010:464 = each is palindrome
1964/4/2: 020464 = 020:464 = each is palindrome
1964/4/2: 241964 = 241:964 = integer ratio of 1 to 4
1964/4/3: 030464 = 030:464 = each is palindrome
1964/4/4: 040464 = 040:464 = each is palindrome
1964/4/5: 050464 = 050:464 = each is palindrome
1964/4/6: 060464 = 060:464 = each is palindrome
1964/4/6: 4664 = palindrome
1964/4/6: 64046 = palindrome
1964/4/6: 6446 = palindrome
1964/4/6: 6464 = cyclic permutation symmetric
1964/4/7: 070464 = 070:464 = each is palindrome
1964/4/8: 080464 = 080:464 = each is palindrome
1964/4/9: 090464 = 090:464 = each is palindrome
1964/4/11: 041164 = 041:164 = integer ratio of 1 to 4
1964/4/16: 041664 = 04:16:64 = geometric series of ratio 4
1964/5/4: 050464 = 050:464 = each is palindrome
1964/5/23: 052364 = 052:364 = integer ratio of 1 to 7
1964/6/1: 1664 = 16:64 = integer ratio of 1 to 4
1964/6/4: 060464 = 060:464 = each is palindrome
1964/6/4: 4664 = palindrome
1964/6/4: 6464 = cyclic permutation symmetric
1964/7/4: 070464 = 070:464 = each is palindrome
1964/7/28: 072864 = 072:864 = integer ratio of 1 to 12
1964/8/1: 010864 = 01:08:64 = geometric series of ratio 8
1964/8/1: 640801 = 64:08:01 = geometric series of ratio 0.125
1964/8/4: 080464 = 080:464 = each is palindrome
1964/8/21: 082164 = 082:164 = integer ratio of 1 to 2
1964/9/4: 090464 = 090:464 = each is palindrome
1964/9/13: 091364 = 091:364 = integer ratio of 1 to 4
1964/9/24: 092464 = 09:24:64 = geometric series of ratio 2.66666666666667
1964/10/1: 641001 = 641:001 = integer ratio of 641 to 1
1964/10/14: 101464 = 101:464 = each is palindrome
1964/11/4: 041164 = 041:164 = integer ratio of 1 to 4
1964/11/14: 111464 = 111:464 = each is palindrome
1964/12/1: 011264 = 011:264 = integer ratio of 1 to 24
1964/12/14: 121464 = 121:464 = each is palindrome