1977/1/1: 1177 = 11:77 = integer ratio of 1 to 7
1977/1/1: 1177 = 11:77 = each is single digit
1977/1/1: 1177 = 11:77 = each is palindrome
1977/1/1: 1177 = 11:77 = each is cyclic permutation symmetric
1977/1/1: 7711 = 77:11 = integer ratio of 7 to 1
1977/1/1: 7711 = 77:11 = each is single digit
1977/1/1: 7711 = 77:11 = each is palindrome
1977/1/1: 7711 = 77:11 = each is cyclic permutation symmetric
1977/1/7: 010777 = 010:777 = each is palindrome
1977/1/10: 011077 = 011:077 = integer ratio of 1 to 7
1977/1/10: 770110 = 770:110 = integer ratio of 7 to 1
1977/2/2: 2277 = 22:77 = each is single digit
1977/2/2: 2277 = 22:77 = each is palindrome
1977/2/2: 2277 = 22:77 = each is cyclic permutation symmetric
1977/2/2: 7722 = 77:22 = each is single digit
1977/2/2: 7722 = 77:22 = each is palindrome
1977/2/2: 7722 = 77:22 = each is cyclic permutation symmetric
1977/2/7: 020777 = 020:777 = each is palindrome
1977/2/17: 021777 = 021:777 = integer ratio of 1 to 37
1977/3/3: 3377 = 33:77 = each is single digit
1977/3/3: 3377 = 33:77 = each is palindrome
1977/3/3: 3377 = 33:77 = each is cyclic permutation symmetric
1977/3/3: 7733 = 77:33 = each is single digit
1977/3/3: 7733 = 77:33 = each is palindrome
1977/3/3: 7733 = 77:33 = each is cyclic permutation symmetric
1977/3/7: 030777 = 030:777 = each is palindrome
1977/4/4: 4477 = 44:77 = each is single digit
1977/4/4: 4477 = 44:77 = each is palindrome
1977/4/4: 4477 = 44:77 = each is cyclic permutation symmetric
1977/4/4: 7744 = 77:44 = each is single digit
1977/4/4: 7744 = 77:44 = each is palindrome
1977/4/4: 7744 = 77:44 = each is cyclic permutation symmetric
1977/4/7: 040777 = 040:777 = each is palindrome
1977/5/5: 5577 = 55:77 = each is single digit
1977/5/5: 5577 = 55:77 = each is palindrome
1977/5/5: 5577 = 55:77 = each is cyclic permutation symmetric
1977/5/5: 7755 = 77:55 = each is single digit
1977/5/5: 7755 = 77:55 = each is palindrome
1977/5/5: 7755 = 77:55 = each is cyclic permutation symmetric
1977/5/7: 050777 = 050:777 = each is palindrome
1977/6/6: 6677 = 66:77 = each is single digit
1977/6/6: 6677 = 66:77 = each is palindrome
1977/6/6: 6677 = 66:77 = each is cyclic permutation symmetric
1977/6/6: 7766 = 77:66 = each is single digit
1977/6/6: 7766 = 77:66 = each is palindrome
1977/6/6: 7766 = 77:66 = each is cyclic permutation symmetric
1977/6/7: 060777 = 060:777 = each is palindrome
1977/7/1: 010777 = 010:777 = each is palindrome
1977/7/2: 020777 = 020:777 = each is palindrome
1977/7/3: 030777 = 030:777 = each is palindrome
1977/7/4: 040777 = 040:777 = each is palindrome
1977/7/5: 050777 = 050:777 = each is palindrome
1977/7/6: 060777 = 060:777 = each is palindrome
1977/7/7: 070777 = 070:777 = each is palindrome
1977/7/7: 77077 = palindrome
1977/7/7: 7777 = single digit
1977/7/7: 7777 = palindrome
1977/7/7: 7777 = cyclic permutation symmetric
1977/7/7: 7777 = 77:77 = each is single digit
1977/7/7: 7777 = 77:77 = each is palindrome
1977/7/7: 7777 = 77:77 = each is cyclic permutation symmetric
1977/7/8: 080777 = 080:777 = each is palindrome
1977/7/9: 090777 = 090:777 = each is palindrome
1977/8/7: 080777 = 080:777 = each is palindrome
1977/8/8: 197788 = 197:788 = integer ratio of 1 to 4
1977/8/8: 7788 = 77:88 = each is single digit
1977/8/8: 7788 = 77:88 = each is palindrome
1977/8/8: 7788 = 77:88 = each is cyclic permutation symmetric
1977/8/8: 8877 = 88:77 = each is single digit
1977/8/8: 8877 = 88:77 = each is palindrome
1977/8/8: 8877 = 88:77 = each is cyclic permutation symmetric
1977/9/1: 197791 = palindrome
1977/9/7: 090777 = 090:777 = each is palindrome
1977/9/9: 7799 = 77:99 = each is single digit
1977/9/9: 7799 = 77:99 = each is palindrome
1977/9/9: 7799 = 77:99 = each is cyclic permutation symmetric
1977/9/9: 9977 = 99:77 = each is single digit
1977/9/9: 9977 = 99:77 = each is palindrome
1977/9/9: 9977 = 99:77 = each is cyclic permutation symmetric
1977/10/1: 011077 = 011:077 = integer ratio of 1 to 7
1977/10/1: 771001 = 771:001 = integer ratio of 771 to 1
1977/10/3: 771003 = 771:003 = integer ratio of 257 to 1
1977/10/17: 101777 = 101:777 = each is palindrome
1977/10/23: 231077 = 231:077 = integer ratio of 3 to 1
1977/11/11: 111177 = 11:11:77 = each is single digit
1977/11/11: 111177 = 11:11:77 = each is palindrome
1977/11/11: 111177 = 11:11:77 = each is cyclic permutation symmetric
1977/11/11: 771111 = 77:11:11 = each is single digit
1977/11/11: 771111 = 77:11:11 = each is palindrome
1977/11/11: 771111 = 77:11:11 = each is cyclic permutation symmetric
1977/11/17: 111777 = 111:777 = integer ratio of 1 to 7
1977/11/17: 111777 = 111:777 = each is single digit
1977/11/17: 111777 = 111:777 = each is palindrome
1977/11/17: 111777 = 111:777 = each is cyclic permutation symmetric
1977/11/22: 112277 = 11:22:77 = each is single digit
1977/11/22: 112277 = 11:22:77 = each is palindrome
1977/11/22: 112277 = 11:22:77 = each is cyclic permutation symmetric
1977/11/22: 221177 = 22:11:77 = each is single digit
1977/11/22: 221177 = 22:11:77 = each is palindrome
1977/11/22: 221177 = 22:11:77 = each is cyclic permutation symmetric
1977/11/22: 771122 = 77:11:22 = each is single digit
1977/11/22: 771122 = 77:11:22 = each is palindrome
1977/11/22: 771122 = 77:11:22 = each is cyclic permutation symmetric
1977/12/17: 121777 = 121:777 = each is palindrome