1919/1/1: 01011919 = 0101:1919 = integer ratio of 1 to 19
1919/1/1: 01011919 = 0101:1919 = each is cyclic permutation symmetric
1919/1/1: 111919 = 111:919 = each is palindrome
1919/1/1: 19190101 = 1919:0101 = integer ratio of 19 to 1
1919/1/1: 19190101 = 1919:0101 = each is cyclic permutation symmetric
1919/1/2: 121919 = 121:919 = each is palindrome
1919/1/3: 131919 = 131:919 = each is palindrome
1919/1/4: 141919 = 141:919 = each is palindrome
1919/1/5: 151919 = 151:919 = each is palindrome
1919/1/6: 010619 = 010:619 = each is 180 deg rotationally symmetric
1919/1/6: 161919 = 161:919 = each is palindrome
1919/1/6: 6119 = 180 deg rotationally symmetric
1919/1/7: 171919 = 171:919 = each is palindrome
1919/1/8: 181919 = 181:919 = each is palindrome
1919/1/9: 010919 = 010:919 = each is palindrome
1919/1/9: 1919 = cyclic permutation symmetric
1919/1/9: 191919 = cyclic permutation symmetric
1919/1/9: 191919 = 191:919 = each is palindrome
1919/1/9: 9119 = palindrome
1919/1/10: 011019 = 01:10:19 = arthimetic series of increment 9
1919/1/13: 011319 = 011:319 = integer ratio of 1 to 29
1919/2/1: 121919 = 121:919 = each is palindrome
1919/2/2: 02021919 = 0202:1919 = each is cyclic permutation symmetric
1919/2/2: 19190202 = 1919:0202 = each is cyclic permutation symmetric
1919/2/9: 020919 = 020:919 = each is palindrome
1919/2/9: 191929 = 191:929 = each is palindrome
1919/2/18: 021819 = 021:819 = integer ratio of 1 to 39
1919/3/1: 131919 = 131:919 = each is palindrome
1919/3/3: 03031919 = 0303:1919 = each is cyclic permutation symmetric
1919/3/3: 19190303 = 1919:0303 = each is cyclic permutation symmetric
1919/3/8: 1938 = 19:38 = integer ratio of 1 to 2
1919/3/8: 3819 = 38:19 = integer ratio of 2 to 1
1919/3/9: 030919 = 030:919 = each is palindrome
1919/3/9: 191939 = 191:939 = each is palindrome
1919/3/11: 031119 = 03:11:19 = arthimetic series of increment 8
1919/4/1: 141919 = 141:919 = each is palindrome
1919/4/4: 04041919 = 0404:1919 = each is cyclic permutation symmetric
1919/4/4: 19190404 = 1919:0404 = each is cyclic permutation symmetric
1919/4/9: 040919 = 040:919 = each is palindrome
1919/4/9: 191949 = 191:949 = each is palindrome
1919/5/1: 151919 = 151:919 = each is palindrome
1919/5/5: 05051919 = 0505:1919 = each is cyclic permutation symmetric
1919/5/5: 19190505 = 1919:0505 = each is cyclic permutation symmetric
1919/5/5: 191955 = 191:955 = integer ratio of 1 to 5
1919/5/7: 1957 = 19:57 = integer ratio of 1 to 3
1919/5/7: 5719 = 57:19 = integer ratio of 3 to 1
1919/5/9: 050919 = 050:919 = each is palindrome
1919/5/9: 191959 = 191:959 = each is palindrome
1919/5/9: 9519 = 95:19 = integer ratio of 5 to 1
1919/5/12: 051219 = 05:12:19 = arthimetic series of increment 7
1919/6/1: 010619 = 010:619 = each is 180 deg rotationally symmetric
1919/6/1: 161919 = 161:919 = each is palindrome
1919/6/1: 19061 = 180 deg rotationally symmetric
1919/6/1: 1961 = 180 deg rotationally symmetric
1919/6/1: 6119 = 180 deg rotationally symmetric
1919/6/6: 06061919 = 0606:1919 = each is cyclic permutation symmetric
1919/6/6: 19190606 = 1919:0606 = each is cyclic permutation symmetric
1919/6/7: 7619 = 76:19 = integer ratio of 4 to 1
1919/6/9: 060919 = 060:919 = each is palindrome
1919/6/9: 191969 = 191:969 = each is palindrome
1919/6/10: 61019 = 180 deg rotationally symmetric
1919/6/11: 61119 = 180 deg rotationally symmetric
1919/6/16: 6161919 = 180 deg rotationally symmetric
1919/7/1: 171919 = 171:919 = each is palindrome
1919/7/5: 5719 = 57:19 = integer ratio of 3 to 1
1919/7/6: 1976 = 19:76 = integer ratio of 1 to 4
1919/7/6: 7619 = 76:19 = integer ratio of 4 to 1
1919/7/7: 07071919 = 0707:1919 = each is cyclic permutation symmetric
1919/7/7: 19190707 = 1919:0707 = each is cyclic permutation symmetric
1919/7/9: 070919 = 070:919 = each is palindrome
1919/7/9: 191979 = 191:979 = each is palindrome
1919/7/13: 071319 = 07:13:19 = arthimetic series of increment 6
1919/8/1: 181919 = 181:919 = each is palindrome
1919/8/3: 3819 = 38:19 = integer ratio of 2 to 1
1919/8/8: 08081919 = 0808:1919 = each is cyclic permutation symmetric
1919/8/8: 19190808 = 1919:0808 = each is cyclic permutation symmetric
1919/8/9: 080919 = 080:919 = each is palindrome
1919/8/9: 191989 = 191:989 = each is palindrome
1919/9/1: 010919 = 010:919 = each is palindrome
1919/9/1: 19091 = palindrome
1919/9/1: 1919 = cyclic permutation symmetric
1919/9/1: 191919 = cyclic permutation symmetric
1919/9/1: 191919 = 191:919 = each is palindrome
1919/9/1: 1991 = palindrome
1919/9/1: 9119 = palindrome
1919/9/2: 020919 = 020:919 = each is palindrome
1919/9/3: 030919 = 030:919 = each is palindrome
1919/9/4: 040919 = 040:919 = each is palindrome
1919/9/5: 050919 = 050:919 = each is palindrome
1919/9/5: 1995 = 19:95 = integer ratio of 1 to 5
1919/9/5: 9519 = 95:19 = integer ratio of 5 to 1
1919/9/6: 060919 = 060:919 = each is palindrome
1919/9/7: 070919 = 070:919 = each is palindrome
1919/9/8: 080919 = 080:919 = each is palindrome
1919/9/9: 090919 = 090:919 = each is palindrome
1919/9/9: 09091919 = 0909:1919 = each is cyclic permutation symmetric
1919/9/9: 19190909 = 1919:0909 = each is cyclic permutation symmetric
1919/9/9: 191999 = 191:999 = each is palindrome
1919/9/10: 91019 = palindrome
1919/9/11: 91119 = palindrome
1919/9/12: 91219 = palindrome
1919/9/13: 91319 = palindrome
1919/9/14: 091419 = 09:14:19 = arthimetic series of increment 5
1919/9/14: 91419 = palindrome
1919/9/15: 91519 = palindrome
1919/9/16: 91619 = palindrome
1919/9/17: 91719 = palindrome
1919/9/18: 091819 = 091:819 = integer ratio of 1 to 9
1919/9/18: 91819 = palindrome
1919/9/19: 91919 = palindrome
1919/9/19: 9191919 = palindrome
1919/10/1: 011019 = 01:10:19 = arthimetic series of increment 9
1919/10/1: 191001 = 19:10:01 = arthimetic series of increment -9
1919/10/1: 191001 = 191:001 = integer ratio of 191 to 1
1919/10/6: 61019 = 180 deg rotationally symmetric
1919/10/9: 91019 = palindrome
1919/10/10: 10101919 = 1010:1919 = each is cyclic permutation symmetric
1919/10/10: 191010 = 191:010 = each is palindrome
1919/10/10: 19191010 = 1919:1010 = each is cyclic permutation symmetric
1919/10/16: 101619 = 101:619 = each is 180 deg rotationally symmetric
1919/10/17: 171019 = 171:019 = integer ratio of 9 to 1
1919/10/19: 101919 = 101:919 = each is palindrome
1919/10/20: 191020 = 191:020 = each is palindrome
1919/10/30: 191030 = 191:030 = each is palindrome
1919/11/1: 191101 = 191:101 = each is palindrome
1919/11/3: 031119 = 03:11:19 = arthimetic series of increment 8
1919/11/3: 191103 = 19:11:03 = arthimetic series of increment -8
1919/11/6: 61119 = 180 deg rotationally symmetric
1919/11/9: 91119 = palindrome
1919/11/11: 11111919 = 1111:1919 = each is cyclic permutation symmetric
1919/11/11: 191111 = 191:111 = each is palindrome
1919/11/11: 19191111 = 1919:1111 = each is cyclic permutation symmetric
1919/11/15: 111519 = 11:15:19 = arthimetic series of increment 4
1919/11/16: 111619 = 111:619 = each is 180 deg rotationally symmetric
1919/11/19: 111919 = 111:919 = each is palindrome
1919/11/21: 191121 = 191:121 = each is palindrome
1919/12/2: 191202 = 191:202 = each is palindrome
1919/12/5: 051219 = 05:12:19 = arthimetic series of increment 7
1919/12/5: 191205 = 19:12:05 = arthimetic series of increment -7
1919/12/9: 91219 = palindrome
1919/12/12: 12121919 = 1212:1919 = each is cyclic permutation symmetric
1919/12/12: 191212 = 191:212 = each is palindrome
1919/12/12: 19191212 = 1919:1212 = each is cyclic permutation symmetric
1919/12/19: 121919 = 121:919 = each is palindrome
1919/12/22: 191222 = 191:222 = each is palindrome