Historical clue formulations

• End of an era? — 2021-09-26
• End of an era? — 2020-10-13
• Last year before A.D. — 2019-03-20
• Turning point in history — 2018-10-14
• End of an ancient period — 2014-10-01
• End of an era? — 2013-10-24
• It falls between 3760 and 3761 on the Jewish calendar — 2013-03-17
• Last non-A.D. year — 2009-11-15
• Time for a fresh start? — 2007-05-19
• Last non-A.D. year — 2005-05-04