Historical clue formulations

• Over — 2025-03-29
• No longer happening — 2022-04-11
• Finished — 2021-06-16
• Over — 2020-11-29
• Finished — 2017-11-03
• See 43-Across — 2016-09-28
• Concluded — 2016-04-08
• Done — 2015-05-10
• Finished — 2012-08-28
• See 71-Across — 2010-02-04
• Done — 2008-10-12
• Done — 2008-08-31
• Finished — 2008-01-28
• Over — 2008-01-27
• Done — 2007-07-29
• Over — 2004-01-23
• Finished — 2002-12-14
• Finished — 1998-04-11