Historical clue formulations

• More than 2,000 years ago, for short — 2025-10-08
• Pre-A.D., in dating — 2025-05-05
• Old dating inits. — 2024-06-09
• Pre-A.D. — 2024-05-24
• Dating inits. — 2024-03-10
• Pre-year 1, in brief — 2023-09-26
• Abbr. in ancient dates — 2023-05-07
• Pre-A.D. — 2021-12-16
• Dating inits. — 2021-03-13
• Dating notation: Abbr. — 2020-12-06
• Dating abbr. — 2020-06-05
• Abbreviation in ancient dates — 2020-02-18
• Dating letters — 2019-07-20
• Pre-A.D. [2] — 2017-09-20
• Pre-A.D. — 2016-12-16
• Dating inits. — 2015-11-27
• Abbr. in dating — 2015-05-26
• Letters after old dates — 2015-01-27
• Pre-A.D. — 2014-07-15
• Dating inits. — 2014-05-17
• Letters after a long-ago date — 2012-09-18
• Letters in an old date — 2010-05-30
• Letters used in dating — 2009-09-12
• Dating letters — 2008-01-05
• Letters accompanying some 2,000-year-old+ dates — 2003-06-14
• Bridge builder's deg. — 1995-07-30